Images of a fourth planet orbiting HR 8799

Abstract

High-contrast near-infrared imaging of the nearby star HR 8799 has shown three giant planets. Such images were possible due to the wide orbits (> 25 AU) and youth (< 100 Myr) of the imaged planets, which are still hot and bright as they radiate away gravitational energy acquired during their formation. A major area of contention in the extrasolar planet community is whether outer planets (> 10 AU) more massive than Jupiter form via one-step gravitational instabilities or, rather, via a two-step process involving accretion of a core followed by accumulation of a massive outer envelope composed primarily of hydrogen and helium. Here we report the presence of a fourth planet, interior to and about the same mass as the other three. The system, with this additional planet, represents a challenge for current planet formation models as none of them can explain the in situ formation of all four planets. With its four young giant planets and known cold/warm debris belts, the HR 8799 planetary system is a unique laboratory to study the formation and evolution of giant planets at wide > 10 AU separations.

20 pages, 4 figures, in press, Nature

References in corpus (6)

• Direct Imaging of Multiple Planets Orbiting the Star HR 8799
• On the Luminosity of Young Jupiters
• The properties of brown dwarfs and low-mass hydrogen-burning stars formed by disc fragmentation
• The Gemini Deep Planet Survey -- GDPS
• Nearby debris disk systems with high fractional luminosity reconsidered
• Near-Infrared Spectroscopy of the Extrasolar Planet HR 8799 b

Cited by in corpus (613)

• The Occurrence and Architecture of Exoplanetary Systems
• Rapid growth of gas-giant cores by pebble accretion
• Detection and Characterization of Exoplanets and Disks using Projections on Karhunen-Loeve Eigenimages
• Resolved Images of Large Cavities in Protoplanetary Transition Disks
• The Hawaii Infrared Parallax Program. I. Ultracool Binaries and the L/T Transition
• The Gemini Planet Imager Exoplanet Survey: Giant Planet and Brown Dwarf Demographics From 10-100 AU
• C/O ratio as a Dimension for Characterizing Exoplanetary Atmospheres
• Forming the cores of giant planets from the radial pebble flux in protoplanetary discs
• Separating gas-giant and ice-giant planets by halting pebble accretion
• Detection of Carbon Monoxide and Water Absorption Lines in an Exoplanet Atmosphere
• The Disk Substructures at High Angular Resolution Project (DSHARP): VII. The Planet-Disk Interactions Interpretation
• Spectral and Photometric Diagnostics of Giant Planet Formation Scenarios
• Extrasolar planet population synthesis IV. Correlations with disk metallicity, mass and lifetime
• Imaging Extrasolar Giant Planets
• Clouds and Chemistry in the Atmosphere of Extrasolar Planet HR8799b
• The VAST Survey - III. The multiplicity of A-type stars within 75 pc
• PynPoint: An Image Processing Package for Finding Exoplanets
• Characterization of exoplanets from their formation I: Models of combined planet formation and evolution
• Adaptive Optics for Astronomy
• LkCa 15: A Young Exoplanet Caught at Formation?
• A Combined Subaru/VLT/MMT 1--5 Micron Study of Planets Orbiting HR 8799: Implications for Atmospheric Properties, Masses, and Formation
• Masses, Radii, and Cloud Properties of the HR 8799 Planets
• The Tucana/Horologium, Columba, AB Doradus, and Argus Associations: New Members and Dusty Debris Disks
• Predictions of the WFIRST Microlensing Survey I: Bound Planet Detection Rates
• Direct Imaging of a Cold Jovian Exoplanet in Orbit around the Sun-like Star GJ 504
• Make Super-Earths, Not Jupiters: Accreting Nebular Gas onto Solid Cores at 0.1 AU and Beyond
• Population Properties of Brown Dwarf Analogs to Exoplanets
• Testing In Situ Assembly with the Kepler Planet Candidate Sample
• Stellar and substellar companions from Gaia EDR3 -- Proper motion anomaly and resolved common proper motion pairs
• Transit Timing Observations from Kepler: IV. Confirmation of 4 Multiple Planet Systems by Simple Physical Models
• The Hawaii Infrared Parallax Program. II. Young Ultracool Field Dwarfs
• HST Spectral Mapping of L/T Transition Brown Dwarfs Reveals Cloud Thickness Variations
• Retrieving scattering clouds and disequilibrium chemistry in the atmosphere of HR 8799e
• Transitional Disks as Signposts of Young, Multiplanet Systems
• Discovery of a probable 4-5 Jupiter-mass exoplanet to HD 95086 by direct-imaging
• Planets Around Low-Mass Stars (PALMS). IV. The Outer Architecture of M Dwarf Planetary Systems
• The Gemini NICI Planet-Finding Campaign: The Frequency of Planets around Young Moving Group Stars
• The Great Escape: How Exoplanets and Smaller Bodies Desert Dying Stars
• Direct Imaging Discovery of a `Super-Jupiter' Around the late B-Type Star Kappa And
• Simultaneous Detection of Water, Methane and Carbon Monoxide in the Atmosphere of Exoplanet HR8799b
• Population-Level Eccentricity Distributions of Imaged Exoplanets and Brown Dwarf Companions: Dynamical Evidence for Distinct Formation Channels
• Planetary System Disruption by Galactic Perturbations to Wide Binary Stars
• First light of the VLT planet finder SPHERE. III. New spectrophotometry and astrometry of the HR8799 exoplanetary system
• Asteroid Belts in Debris Disk Twins: VEGA and FOMALHAUT
• Atmospheric Dynamics of Hot Exoplanets
• A self-consistent cloud model for brown dwarfs and young giant exoplanets: comparison with photometric and spectroscopic observations
• Orbital characterization of the βPictoris b giant planet
• The JWST Early Release Science Program for Direct Observations of Exoplanetary Systems II: A 1 to 20 Micron Spectrum of the Planetary-Mass Companion VHS 1256-1257 b
• Model atmospheres for massive gas giants with thick clouds: Application to the HR 8799 planets and predictions for future detections
• Rapid inward migration of planets formed by gravitational instability
• Detection and Characterization of Exoplanets using Projections on Karhunen-Loeve Eigenimages: Forward Modeling
• Discovery of a young planetary mass companion to the nearby M dwarf VHS J125601.92-125723.9
• HD 106906 b: A planetary-mass companion outside a massive debris disk
• The TRENDS High-Contrast Imaging Survey. IV. The Occurrence Rate of Giant Planets around M-Dwarfs
• The International Deep Planet Survey I. The frequency of wide-orbit massive planets around A-stars
• Spectral and atmospheric characterization of 51 Eridani b using VLT/SPHERE
• A library of near-infrared integral field spectra of young M-L dwarfs
• Constraining the initial entropy of directly-detected exoplanets
• 2MASSJ035523.51+113337.4: A Young, Dusty, Nearby, Isolated Brown Dwarf Resembling A Giant Exoplanet
• The Gemini NICI Planet-Finding Campaign: The Frequency of Giant Planets around Young B and A Stars
• A Statistical Analysis of SEEDS and Other High-Contrast Exoplanet Surveys: Massive Planets or Low-Mass Brown Dwarfs?
• First direct detection of an exoplanet by optical interferometry; Astrometry and K-band spectroscopy of HR8799 e
• HELIOS-Retrieval: An Open-source, Nested Sampling Atmospheric Retrieval Code, Application to the HR 8799 Exoplanets and Inferred Constraints for Planet Formation
• First Light LBT AO Images of HR 8799 bcde at 1.65 and 3.3 Microns: New Discrepancies between Young Planets and Old Brown Dwarfs
• Scientific Discovery with the James Webb Space Telescope
• Resolving the HD 100546 Protoplanetary System with the Gemini Planet Imager: Evidence for Multiple Forming, Accreting Planets
• Direct detection of scattered light gaps in the transitional disk around HD 97048 with VLT/SPHERE
• The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets
• Review of small-angle coronagraphic techniques in the wake of ground-based second-generation adaptive optics systems
• First light of the VLT planet finder SPHERE. IV. Physical and chemical properties of the planets around HR8799
• Directly Imaged L-T Transition Exoplanets in the Mid-Infrared
• Identifying gaps in flaring Herbig Ae/Be disks using spatially resolved mid-infrared imaging. Are all group I disks transitional?
• Cool Jupiters greatly outnumber their toasty siblings: Occurrence rates from the Anglo-Australian Planet Search
• Formation of giant planets and brown dwarfs on wide orbits
• Formation of Giant Planets by Disk Instability on Wide Orbits Around Protostars with Varied Masses
• The Atmospheres of Earth-like Planets after Giant Impact Events
• Dynamical Constraints on the HR 8799 Planets with GPI
• Direct Imaging Confirmation and Characterization of a Dust-Enshrouded Candidate Exoplanet Orbiting Fomalhaut
• Reconnaissance of the HR 8799 Exosolar System I: Near IR Spectroscopy
• First light of the VLT planet finder SPHERE. II. The physical properties and the architecture of the young systems PZ Tel and HD 1160 revisited
• Gas Giant Formation with Small Cores Triggered by Envelope Pollution by Icy Planetesimals
• Long-term evolution of three-planet systems to the post-Main Sequence and beyond
• M-band Imaging of the HR 8799 Planetary System Using an Innovative LOCI-based Background Subtraction Technique
• Discovery of a wide planetary-mass companion to the young M3 star GU Psc
• GENESIS: New Self-Consistent Models of Exoplanetary Spectra
• Characterizing 51 Eri b from 1-5 $\mu$m: a partly-cloudy exoplanet
• Planet-Planet Scattering Alone Cannot Explain the Free-Floating Planet Population
• Bimodality of circumstellar disk evolution induced by Hall current
• The International Deep Planet Survey II: The frequency of directly imaged giant exoplanets with stellar mass
• A survey of young, nearby, and dusty stars to understand the formation of wide-orbit giant planets
• Characterization of exoplanets from their formation III: The statistics of planetary luminosities
• Direct Imaging and Spectroscopy of a Candidate Companion Below/Near the Deuterium-Burning Limit In The Young Binary Star System, ROXs 42B
• An Enigmatic Pointlike Feature within the HD 169142 Transitional Disk
• Fingerprints of giant planets in the photospheres of Herbig stars
• SONS: The JCMT legacy survey of debris discs in the submillimetre
• A Combined VLT and Gemini Study of the Atmosphere of the Directly-Imaged Planet, beta Pictoris b
• High-contrast Imaging Search for Planets and Brown Dwarfs around the Most Massive Stars in the Solar Neighborhood
• The near-infrared spectral energy distribution of β Pictoris b
• The VLT/NaCo large program to probe the occurrence of exoplanets and brown dwarfs at wide orbits: II- Survey description, results and performances
• Unstable low-mass planetary systems as drivers of white dwarf pollution
• A Disk Around the Planetary-Mass Companion GSC 06214-00210 b: Clues About the Formation of Gas Giants on Wide Orbits
• Planets Around Low-Mass Stars (PALMS). III. A Young Dusty L Dwarf Companion at the Deuterium-Burning Limit
• Recovery of the Candidate Protoplanet HD 100546 b with Gemini/NICI and Detection of Additional (Planet-Induced?) Disk Structure at Small Separations
• Atmospheric Retrieval Analysis of the Directly Imaged Exoplanet HR 8799b
• Detectable close-in planets around white dwarfs through late unpacking
• Reconnaissance of the HR 8799 Exosolar System II: Astrometry and Orbital Motion
• A Candidate Young Massive Planet in Orbit around the Classical T Tauri Star CI Tau
• The effects of dynamical interactions on planets in young substructured star clusters
• Resolved Imaging of the HR 8799 Debris Disk with Herschel
• No Clear, Direct Evidence for Multiple Protoplanets Orbiting LkCa 15: LkCa 15 bcd are Likely Inner Disk Signals
• Deuterium Burning in Massive Giant Planets and Low-Mass Brown Dwarfs formed by Core-Nucleated Accretion
• The dust grain size - stellar luminosity trend in debris discs
• 1 to 2.4 micron Near-IR spectrum of the Giant Planet $\beta$ Pictoris b obtained with the Gemini Planet Imager
• VLT/NACO Polarimetric Differential Imaging of HD100546 - Disk Structure and Dust Grain Properties between 10-140 AU
• The VLT/NaCo Large program to probe the occurrence of exoplanets and brown dwarfs in wide orbits: I- Sample definition and characterization
• Doppler Imaging of Exoplanets and Brown Dwarfs
• Gemini Planet Imager Spectroscopy of the HR 8799 planets c and d
• Highlights in the Study of Exoplanet Atmospheres
• Evidence Against an Edge-On Disk Around the Extrasolar Planet 2MASS 1207 b and a New Thick Cloud Explanation for its Under-Luminosity
• Direct detection of exoplanets in the 3 -- 10 micron range with E-ELT/METIS
• The Moving Group Targets of the SEEDS High-Contrast Imaging Survey of Exoplanets and Disks: Results and Observations from the First Three Years
• Infrared Non-detection of Fomalhaut b -- Implications for the Planet Interpretation
• C/O Ratios of Stars with Transiting Hot Jupiter Exoplanets
• High resolution imaging of young M-type stars of the solar neighborhood: Probing the existence of companions down to the mass of Jupiter
• The CHARA Array Angular Diameter of HR 8799 Favors Planetary Masses for Its Imaged Companions
• Resolved Submillimeter Observations of the HR 8799 and HD 107146 Debris Disks
• The Arecibo Detection of the Coolest Radio-flaring Brown Dwarf
• The GALEX Nearby Young-Star Survey
• Spectroscopic Confirmation of Young Planetary-Mass Companions on Wide Orbits
• A Trend Between Cold Debris Disk Temperature and Stellar Type: Implications for the Formation and Evolution of Wide-Orbit Planets
• Discovery of Rotational Modulations in the Planetary-Mass Companion 2M1207b: Intermediate Rotation Period and Heterogeneous Clouds in a Low Gravity Atmosphere
• Performance of the VLT Planet Finder SPHERE I. Photometry and astrometry precision with IRDIS and IFS in laboratory
• Direct Imaging Detection of Methane in the Atmosphere of GJ 504 b
• The Gemini NICI Planet-Finding Campaign: Discovery of a Multiple System Orbiting the Young A Star HD 1160
• Disentangling degenerate solutions from primary transit and secondary eclipse spectroscopy of exoplanets
• A gap in the planetesimal disc around HD 107146 and asymmetric warm dust emission revealed by ALMA
• Let the Great World Spin: Revealing the Stormy, Turbulent Nature of Young Giant Exoplanet Analogs with the Spitzer Space Telescope
• The SEEDS Direct Imaging Survey for Planets and Scattered Dust Emission in Debris Disk Systems
• The mass of Beta Pictoris c from Beta Pictoris b orbital motion
• Spectroscopic characterization of HD 95086 b with the Gemini Planet Imager
• Condition for Capture into First-order Mean Motion Resonances and Application to Constraints on Origin of Resonant Systems
• The Near-Infrared Spectrograph (NIRSpec) on the James Webb Space Telescope IV. Capabilities and predicted performance for exoplanet characterization
• Fomalhaut b: Independent Analysis of the Hubble Space Telescope Public Archive Data
• The formation of the solar system
• Formation, Orbital and Internal Evolutions of Young Planetary Systems
• CFBDSIR2149-0403: a 4-7 Jupiter-mass free-floating planet in the young moving group AB Doradus ?
• Extreme orbital evolution from hierarchical secular coupling of two giant planets
• Full-lifetime simulations of multiple unequal-mass planets across all phases of stellar evolution
• Resolving the Planetesimal Belt of HR 8799 with ALMA
• Multiple mean motion resonances in the HR 8799 planetary system
• Discovery of a ~23 Mjup Brown Dwarf Orbiting ~700 AU from the Massive Star HIP 78530 in Upper Scorpius
• Astrometric Monitoring of the HR 8799 Planets: Orbit Constraints from Self-Consistent Measurements
• Planetary chaotic zone clearing: destinations and timescales
• Clouds and Hazes in Exoplanet Atmospheres
• Images of the Extended Outer Regions of the Debris Ring Around HR 4796 A
• VLT/SPHERE robust astrometry of the HR8799 planets at milliarcsecond-level accuracy Orbital architecture analysis with PyAstrOFit
• Sparse aperture masking at the VLT I. Faint companion detection limits for the two debris disk stars HD 92945 and HD 141569
• A 5 Micron Image of beta Pictoris b at a Sub-Jupiter Projected Separation: Evidence for a Misalignment Between the Planet and the Inner, Warped Disk
• High-Cadence, High-Contrast Imaging for Exoplanet Mapping: Observations of the HR 8799 Planets with VLT/SPHERE Satellite Spot-Corrected Relative Photometry
• The GJ 504 system revisited. Combining interferometric, radial velocity, and high contrast imaging data
• Imaging Discovery of the Debris Disk Around HIP 79977
• Radial Velocity Measurements of HR 8799 b and c with Medium Resolution Spectroscopy
• Two Directly Imaged, Wide-orbit Giant Planets around the Young, Solar Analog TYC 8998-760-1
• Detection and Bulk Properties of the HR 8799 Planets with High Resolution Spectroscopy
• Experimental Design for the Gemini Planet Imager
• Probing the Physical Properties of Directly Imaged Gas Giant Exoplanets Through Polarization
• The First H-band Spectrum of the Massive Gas Giant Planet beta Pictoris b with the Gemini Planet Imager
• Reference star differential imaging of close-in companions and circumstellar disks with the NIRC2 vortex coronagraph at W.M. Keck Observatory
• Observational Constraints on Companions inside of 10 AU in the HR 8799 Planetary System
• Direct Imaging and Astrometric Detection of a Gas Giant Planet Orbiting an Accelerating Star
• Orbital migration of interacting low-mass planets in evolutionary radiative turbulent models
• Variability in a Young, L/T Transition Planetary-Mass Object
• Evolution of Gas Giant Entropy During Formation by Runaway Accretion
• LBT observations of the HR 8799 planetary system: First detection of HR8799e in H band
• The Heavy Element Composition of Disk Instability Planets Can Range From Sub- to Super-Nebular
• New developments for modern celestial mechanics. I. General coplanar three-body systems. Application to exoplanets
• A case of simultaneous star and planet formation
• Stirring in massive, young debris discs from spatially resolved Herschel images
• A Direct Imaging Survey of Spitzer detected debris disks: Occurrence of giant planets in dusty systems
• The Laplace resonance in the Kepler-60 system
• The Gemini NICI Planet-Finding Campaign: The Companion Detection Pipeline
• Modeling Self-Subtraction in Angular Differential Imaging: Application to the HD 32297 Debris Disk
• Effects of radiation transfer on the structure of self-gravitating disks, their fragmentation and evolution of the fragments
• Magellan Adaptive Optics first-light observations of the exoplanet $\beta$ Pic b. I. Direct imaging in the far-red optical with MagAO+VisAO and in the near-IR with NICI
• WISEP J004701.06+680352.1: An intermediate surface gravity, dusty brown dwarf in the AB Dor Moving Group
• The VLTI / PIONIER near-infrared interferometric survey of southern T Tauri stars. I. First results
• Deep Thermal Infrared Imaging of HR 8799 bcde: New Atmospheric Constraints and Limits on a Fifth Planet
• The LEECH Exoplanet Imaging Survey: Characterization of the Coldest Directly Imaged Exoplanet, GJ 504 b, and Evidence for Super-Stellar Metallicity
• The SPHERE infrared survey for exoplanets (SHINE) -- II. Observations, Data reduction and analysis Detection performances and early-results
• How to design a planetary system for different scattering outcomes: giant impact sweet spot, maximising exocomets, scattered disks
• Global models of planetary system formation in radiatively-inefficient protoplanetary discs
• PynPoint: a modular pipeline architecture for processing and analysis of high-contrast imaging data
• Dead zones as safe-havens for planetesimals: influence of disc mass and external magnetic field
• The Measurement, Treatment, and Impact of Spectral Covariance and Bayesian Priors in Integral-Field Spectroscopy of Exoplanets
• The Kappa Andromedae System: New Constraints on the Companion Mass, System Age & Further Multiplicity
• Search for free-floating planetary-mass objects in the Pleiades
• Testing giant planet formation in the transitional disk of SAO 206462 using deep VLT/SPHERE imaging
• The Ages of A-Stars I: Interferometric Observations and Age Estimates for Stars in the Ursa Major Moving Group
• Starlight Demonstration of the Dragonfly Instrument: an Integrated Photonic Pupil Remapping Interferometer for High Contrast Imaging
• Debris Distribution in HD 95086 - A Young Analog of HR 8799
• Transit confirmation and improved stellar and planet parameters for the super-Earth HD 97658 b and its host star
• A revised condition for self-gravitational fragmentation of protoplanetary disks
• Spectral Variability of VHS J1256-1257 b from 1 to 5 $\mu$m
• Predictions for Shepherding Planets in Scattered Light Images of Debris Disks
• GPI spectra of HR 8799 c, d, and e from 1.5 to 2.4$\mu$m with KLIP Forward Modeling
• High-Mass, Four-Planet Models for HR 8799: Constraining the Orbital Inclination and Age of the System
• Constrains on planets around beta Pic with Harps radial velocity data
• Determination of the inclination of the multi-planet hosting star HR8799 using asteroseismology
• Rotation Periods, Inclinations, and Obliquities of Cool Stars Hosting Directly Imaged Substellar Companions: Spin-Orbit Misalignments are Common
• The Occurrence of Wide-Orbit Planets in Binary Star Systems
• Deep exploration of the planets HR 8799 b, c, and d with moderate resolution spectroscopy
• Likely Members of the Beta Pictoris and AB Doradus Moving Groups in the North
• High Contrast Imaging of the Close Environment of HD 142527 -
• Planet gaps in the dust layer of 3D protoplanetary disks. II. Observability with ALMA
• On the Mass Function, Multiplicity, and Origins of Wide-Orbit Giant Planets
• The TRENDS High-Contrast Imaging Survey. V. Discovery of an Old and Cold Benchmark T-dwarf Orbiting the Nearby G-star HD 19467
• The LEECH Exoplanet Imaging Survey. Further constraints on the planet architecture of the HR 8799 system
• The scattering of small bodies in planetary systems: constraints on the possible orbits of cometary material
• The SPHERE infrared survey for exoplanets (SHINE)- I Sample definition and target characterization
• On the Composition of Young, Directly Imaged Giant Planets
• SCExAO/CHARIS Near-Infrared Direct Imaging, Spectroscopy, and Forward-Modeling of kappa And b: A Likely Young, Low-Gravity Superjovian Companion
• Direct Detection and Orbit Analysis of the Exoplanets HR 8799 bcd from Archival 2005 Keck/NIRC2 Data
• Dawes Review. The tidal downsizing hypothesis of planet formation
• Discovery of Seven Companions to Intermediate Mass Stars with Extreme Mass Ratios in the Scorpius-Centaurus Association
• Planet populations inferred from debris discs: insights from 178 debris systems in the ISPY, LEECH and LIStEN planet-hunting surveys
• Type I planet migration in weakly magnetised laminar discs
• GPI PSF subtraction with TLOCI: the next evolution in exoplanet/disk high-contrast imaging
• Solar System Physics for Exoplanet Research
• Apodized Pupil Lyot Coronagraphs for Arbitrary Apertures. IV. Reduced Inner Working Angle and Increased Robustness to Low-Order Aberrations
• A gap in HD 92945's broad planetesimal disc revealed by ALMA
• Characterizing the Orbital and Dynamical State of the HD 82943 Planetary System With Keck Radial Velocity Data
• Direct Imaging Search for Extrasolar Planets in the Pleiades
• Speckle Suppression with the Project 1640 Integral Field Spectrograph
• ACRONYM III: Radial Velocities for 336 Candidate Young Low-Mass Stars in the Solar Neighborhood, Including 78 Newly Confirmed Young Moving Group Members
• Secondary eclipse observations for seven hot-Jupiters from the Anglo-Australian Telescope
• A Pan-STARRS + UKIDSS Search for Young, Wide Planetary-Mass Companions in Upper Scorpius
• How do Most Planets Form? -- Constraints on Disk Instability from Direct Imaging
• SPOTS: The Search for Planets Orbiting Two Stars: II. First constraints on the frequency of sub-stellar companions on wide circumbinary orbits
• Sub-stellar Companions and Stellar Multiplicity in the Taurus Star-Forming Region
• Characterization of the gaseous companion κ Andromedae b: New Keck and LBTI high-contrast observations
• A search for a 5th planet around HR 8799 using the star-hopping RDI technique at VLT/SPHERE
• SCExAO/CHARIS Direct Imaging Discovery of a 20 au Separation, Low-Mass Ratio Brown Dwarf Companion to an Accelerating Sun-like Star
• Performance characterization of a broadband vector Apodizing Phase Plate coronagraph
• Adaptive Optics imaging of VHS 1256-1257: A Low Mass Companion to a Brown Dwarf Binary System
• Identifying and Analysing Protostellar Disc Fragments in Smoothed Particle Hydrodynamics Simulations
• Four-of-a-kind? Comprehensive atmospheric characterisation of the HR 8799 planets with VLTI/GRAVITY
• Disc fragmentation rarely forms planetary-mass objects
• Near-Infrared Detection and Characterization of the Exoplanet HD 95086 b with the Gemini Planet Imager
• Habitable Zones of Post-Main Sequence Stars
• Giant Planets, Tiny Stars: Producing Short-Period Planets around White Dwarfs with the Eccentric Kozai-Lidov Mechanism
• The dynamical fate of planetary systems in young star clusters
• Resonant Removal of Exomoons During Planetary Migration
• Spectral and orbital characterisation of the directly imaged giant planet HIP 65426 b
• Estimates of the Planet Yield from Ground-Based High-Contrast Imaging Observations as a Function of Stellar Mass
• Polarized scattered light from self-luminous exoplanets. Three-dimensional scattering radiative transfer with ARTES
• On the Morphology and Chemical Composition of the HR 4796A Debris Disk
• Is there an exoplanet in the Solar System?
• Mass constraints for 15 protoplanetary disks from HD 1-0
• A wide-orbit giant planet in the high-mass b Centauri binary system
• The JWST Early Release Science Program for the Direct Imaging & Spectroscopy of Exoplanetary Systems
• Spatially Resolved Images of Dust Belt(s) Around the Planet-hosting Subgiant Kappa CrB
• Estimation and correction of wavefront aberrations using the self-coherent camera: laboratory results
• An insight in the surroundings of HR4796
• The Dawes Review 3: The Atmospheres of Extrasolar Planets and Brown Dwarfs
• The Water Abundance of the Directly Imaged Substellar Companion κ And b Retrieved from a Near Infrared Spectrum
• Influence of viscosity and the adiabatic index on planetary migration
• High-contrast imaging in polychromatic light with the self-coherent camera
• New HST data and modeling reveal a massive planetesimal collision around Fomalhaut
• High-contrast imaging of HD 163296 with the Keck/NIRC2 L'-band vortex coronograph
• A detailed characterization of HR 8799's debris disk with ALMA in Band 7
• The First Dynamical Mass Measurement in the HR 8799 System
• Self-Stirring of Debris Discs by Planetesimals Formed by Pebble Concentration
• A First-Look Atmospheric Modeling Study of the Young Directly-Imaged Planet-Mass Companion, ROXs 42Bb
• TESS Observations of the Luhman 16AB Brown Dwarf System: Rotational Periods, Lightcurve Evolution, and Zonal Circulation
• The unseen planets of double belt debris disk systems
• The mass and size of Herbig disks as seen by ALMA
• New constraints on the formation and settling of dust in the atmospheres of young M and L dwarfs
• Insights into the planetary dynamics of HD 206893 with ALMA
• FIRST, a fibered aperture masking instrument. I. First on-sky test results
• Secretly Eccentric: The Giant Planet and Activity Cycle of GJ 328
• Planets around stars in young nearby associations *** radial Velocity searches: a feasibility study, and first results
• Recent developments in planet migration theory
• The Mass-Luminosity Relation in the L/T Transition: Individual Dynamical Masses for the New J-Band Flux Reversal Binary SDSSJ105213.51+442255.7AB
• Discovery of a directly imaged planet to the young solar analog YSES 2
• Host star metallicity of directly imaged wide-orbit planets: implications for planet formation
• New Brown Dwarf Companions to Young Stars in Scorpius-Centaurus
• Hint of curvature in the orbital motion of the exoplanet 51 Eridani b using 3 years of VLT/SPHERE monitoring
• COol Companions ON Ultrawide orbiTS (COCONUTS). I. A High-Gravity T4 Benchmark around an Old White Dwarf and A Re-Examination of the Surface-Gravity Dependence of the L/T Transition
• BANYAN. VI. Discovery of a companion at the brown dwarf/planet-mass limit to a Tucana-Horologium M dwarf
• Belt(s) of debris resolved around the Sco-Cen star HIP 67497
• The Ultra Cool Brown Dwarf Companion of WD 0806-661: Age, Mass, and Formation Mechanism
• The Climates of Other Worlds: A Review of the Emerging Field of Exoplanet Climatology
• Peering into the Young Planetary System AB Pic. Atmosphere, Orbit, Obliquity & Second Planetary Candidate
• The Hawaii Infrared Parallax Program. III. 2MASS J0249-0557 c: A Wide Planetary-mass Companion to a Low-mass Binary in the beta Pic Moving Group
• The Scattered Disc of HR 8799
• Astrometric Accelerations as Dynamical Beacons: Discovery and Characterization of HIP 21152 B, the First T-Dwarf Companion in the Hyades
• Resolved Millimeter-Wavelength Observations of Debris Disks around Solar-Type Stars
• ALMA 1.3 Millimeter Map of the HD 95086 System
• On the Chemical Abundance of HR 8799 and the Planet c
• New constraints on the disk characteristics and companion candidates around T Cha with VLT/SPHERE
• Roaring Storms in the Planetary-Mass Companion VHS 1256-1257 b: Hubble Space Telescope Multi-epoch Monitoring Reveals Vigorous Evolution in an Ultra-cool Atmosphere
• Stability and Occurrence Rate Constraints on the Planetary Sculpting Hypothesis for "Transitional" Disks
• Retrieving C and O Abundance of HR 8799 c by Combining High- and Low-Resolution Data
• Supervised detection of exoplanets in high-contrast imaging sequences
• Dynamical Mass of the Young Substellar Companion HD 984 B
• ISPY -- NACO Imaging Survey for Planets around Young stars: Survey description and results from the first 2.5 years of observations
• Observing Strategies for the Detection of Jupiter Analogs
• Mapping Directly Imaged Giant Exoplanets
• Orbital Stability of Multi-Planet Systems: Behavior at High Masses
• Direct Exoplanet Detection with Binary Differential Imaging
• Orbital and dynamical analysis of the system around HR 8799. New astrometric epochs from VLT/SPHERE and LBT/LUCI
• Multi-epoch Direct Imaging and Time-Variable Scattered Light Morphology of the HD 163296 Protoplanetary Disk
• KELT-21b: A Hot Jupiter Transiting the Rapidly-Rotating Metal-Poor Late-A Primary of a Likely Hierarchical Triple System
• Formation, orbital and thermal evolution, and survival of planetary-mass clumps in the early phase of circumstellar disk evolution
• Effects of a planetesimal debris disk on stability scenarios for the extrasolar planetary system HR 8799
• The Nearest Isolated Member of the TW Hydrae Association is a Giant Planet Analog
• Can eccentric debris disks be long-lived? A first numerical investigation and application to ${\zeta }^2$ Reticuli
• Triggered fragmentation in self-gravitating discs: forming fragments at small radii
• An exact, generalised Laplace resonance in the HR 8799 planetary system
• Discovery of an Edge-on Debris Disk with a Dust Ring and an Outer Disk Wing-tilt Asymmetry
• Constraints on the occurrence and distribution of 1--20 \mj\ companions to stars at separations of 5--5000\,au from a compilation of direct imaging surveys
• A Thermal Infrared Imaging Study of Very Low-Mass, Wide Separation Brown Dwarf Companions to Upper Scorpius Stars: Constraining Circumstellar Environments
• High resolution ALMA and HST images of q${}^1$ Eri: an asymmetric debris disc with an eccentric Jupiter
• Resolved Millimeter Observations of the HR 8799 Debris Disk
• The Direct Detectability of Giant Exoplanets in the Optical
• Direct emission spectroscopy of exoplanets with the medium resolution imaging spectrometer on board JWST MIRI: I. Molecular mapping and sensitivity to instrumental effects
• Multiband GPI Imaging of the HR 4796A Debris Disk
• A peculiar class of debris disks from Herschel/DUNES - A steep fall off in the far infrared
• The Reversibility Error Method (REM): a new, dynamical fast indicator for planetary dynamics
• Bringing "The Moth" to Light: A Planet-Sculpting Scenario for the HD 61005 Debris Disk
• Improving Orbit Estimates for Incomplete Orbits with a New Approach to Priors -- with Applications from Black Holes to Planets
• L'-band AGPM vector vortex coronagraph's first light on LBTI/LMIRCam
• A PCA-based approach for subtracting thermal background emission in high-contrast imaging data
• Molecule mapping of HR8799b using OSIRIS on Keck: Strong detection of water and carbon monoxide, but no methane
• A High-Contrast Search for Variability in HR 8799bc with VLT-SPHERE
• Direct Imaging Constraints on the Putative Exoplanet 14 Her c
• The 5 GHz Arecibo Search for Radio Flares from Ultracool Dwarfs
• Tidal circularization of gaseous planets orbiting white dwarfs
• Detecting Water In the atmosphere of HR 8799 c with L-band High Dispersion Spectroscopy Aided By Adaptive Optics
• An ALMA Constraint on the GSC 6214-210 B Circum-Substellar Accretion Disk Mass
• Methane in Analogs of Young Directly Imaged Exoplanets
• Fly-by encounters between two planetary systems II: Exploring the interactions of diverse planetary system architectures
• Planets Around Low-Mass Stars (PALMS). V. Age-Dating Low-Mass Companions to Members and Interlopers of Young Moving Groups
• Young Exoplanet Transit Initiative (YETI)
• Searching for young Jupiter analogs around AP Col: L-band high-contrast imaging of the closest pre-main sequence star
• Constraining planetesimal stirring: how sharp are debris disc edges?
• Near-Infrared Spectroscopy of 2M0441+2301 AabBab: A Quadruple System Spanning the Stellar to Planetary Mass Regimes
• Keck/NIRC2 Imaging of the Warped, Asymmetric Debris Disk around HD 32297
• ALMA observations of the multiplanet system 61 Vir: What lies outside super-Earth systems?
• Pursuing the planet-debris disk connection: Analysis of upper limits from the Anglo-Australian Planet Search
• Optical and Near-Infrared Spectra of sigma Orionis Isolated Planetary-mass Objects
• Is the HD 15115 inner disk really asymmetrical ?
• The Orbital Eccentricities of Directly Imaged Companions Using Observable-Based Priors: Implications for Population-level Distributions
• The Origin of Heavy Element Content Trend in Giant Planets via Core Accretion
• VLT/NACO astrometry of the HR8799 planetary system. L'-band observations of the three outer planets
• Pebble Accretion in Turbulent Protoplanetary Disks
• Towards on-sky adaptive optics control using reinforcement learning
• Imaging detection of the inner dust belt and the four exoplanets in the HR8799 system with JWST's MIRI coronagraph
• Investigating the presence of two belts in the HD 15115 system
• SPOTS: The Search for Planets Orbiting Two Stars. I. Survey description and first observations
• A New M Dwarf Debris Disk Candidate in a Young Moving Group Discovered with Disk Detective
• High-performance 3D waveguide architecture for astronomical pupil-remapping interferometry
• Resolving the inner regions of the HD97048 circumstellar disk with VLT/NACO polarimetric differential imaging
• Capture of Irregular Satellites via Binary Planetesimal Exchange Reactions in Migrating Planetary Systems
• WISEP J180026.60+013453.1: A Nearby Late L Dwarf Near the Galactic Plane
• The Gemini NICI Planet-Finding Campaign: The Offset Ring of HR 4796 A
• Completeness of Imaging Surveys for Eccentric Exoplanets
• Quantification of stochastic fragmentation of self-gravitating discs
• Precise radial velocities of giant stars VI. A possible 2:1 resonant planet pair around the K giant star $\eta$ Cet
• Focal plane wavefront sensor achromatization : The multireference self-coherent camera
• Characterizing HR3549B using SPHERE
• Atmospheric characterization of directly imaged exoplanets with JWST/MIRI
• Apodized phase mask coronagraphs for arbitrary apertures
• Origin and evolution of two-component debris discs and an application to the q${}^1$ Eridani system
• Radial Velocity Discovery of an Eccentric Jovian World Orbiting at 18 au
• ISPY-NACO Imaging Survey for Planets around Young stars. The demographics of forming planets embedded in protoplanetary disks
• Very Low-Mass Stellar and Substellar Companions to Solar-Like Stars from MARVELS I: A Low Mass Ratio Stellar Companion to TYC 4110-01037-1 in a 79-day Orbit
• The Effect of Protoplanetary Disk Cooling Times on the Formation of Gas Giant Planets by Gravitational Instability
• Early Results from VLT-SPHERE: Long-Slit Spectroscopy of 2MASS 0122-2439B, a Young Companion Near the Deuterium Burning Limit
• Atmospheric Monitoring and Precise Spectroscopy of the HR 8799 Planets with SCExAO/CHARIS
• Spatially resolved submm imaging of the HR 8799 debris disk
• Search for cool giant exoplanets around young and nearby stars - VLT/NaCo near-infrared phase-coronagraphic and differential imaging
• The orbital architecture and debris disks of the HR 8799 planetary system
• Chemical analysis of early-type stars with planets
• Exomoons as sources of white dwarf pollution
• Dynamical Mass of the Exoplanet Host Star HR 8799
• Empty gaps? Depleting annular regions in debris discs by secular resonance with a two-planet system
• VLT/SPHERE astrometric confirmation and orbital analysis of the brown dwarf companion HR 2562 B
• Detecting Exomoons Around Self-luminous Giant Exoplanets Through Polarization
• Characterizing the Atmospheres of the HR8799 Planets with HST/WFC3
• Clearing residual planetesimals by sweeping secular resonances in transitional disks: a lone-planet scenario for the wide gaps in debris disks around Vega and Fomalhaut
• Long-term stability of the HR 8799 planetary system without resonant lock
• Herschel Observations of Dusty Debris Disks
• Super-Earths: A New Class of Planetary Bodies
• Remnant gas in evolved circumstellar disks: Herschel PACS observations of 10-100 Myr old disk systems
• Classification of the Circumstellar Disk Evolution During the Main Accretion Phase
• Lambda Boo Abundance Patterns: Accretion from Orbiting Sources
• Detecting the Signatures of Uranus and Neptune
• Dynamical models to explain observations with SPHERE in planetary systems with double debris belts
• The Near Infrared Imager and Slitless Spectrograph for the James Webb Space Telescope -- IV. Aperture Masking Interferometry
• Gemini Planet Imager Observational Calibrations VI: Photometric and Spectroscopic Calibration for the Integral Field Spectrograph
• Direct Formation of Planetary Embryos in Self-Gravitating Disks
• The REASONS Survey: Resolved Millimeter Observations of a Large Debris Disk Around the Nearby F Star HD 170773
• The Separation and H-alpha Contrasts of Massive Accreting Planets in the Gaps of Transitional Disks: Predicted H-alpha Protoplanet Yields for Adaptive Optics Surveys
• JWST-TST High Contrast: Living on the Wedge, or, NIRCam Bar Coronagraphy Reveals CO${}_2$ in the HR 8799 and 51 Eri Exoplanets' Atmospheres
• Imaging exoplanets with coronagraphic instruments
• Polynomial Apodizers for Centrally Obscured Vortex Coronagraphs
• PSYM-WIDE: a survey for large-separation planetary-mass companions to late spectral type members of young moving groups
• A Wide Planetary Mass Companion Discovered Through the Citizen Science Project Backyard Worlds: Planet 9
• Simulated performance of the molecular mapping for young giant exoplanets with the Medium Resolution Spectrometer of JWST/MIRI
• Dynamical masses of M-dwarf binaries in young moving groups: I - The case of TWA 22 and GJ 2060
• Cloud Atlas: High-precision HST/WFC3/IR Time-Resolved Observations of Directly-Imaged Exoplanet HD106906b
• Oort cloud perturbations as a source of hyperbolic Earth impactors
• Transits of extrasolar moons around luminous giant planets
• On the cavity of a debris disc carved by a giant planet
• Piercing the Glare: Direct Imaging Search for Planets in the Sirius System
• Extrasolar Kuiper Belts
• Deep orbital search for additional planets in the HR 8799 system
• MOST light-curve analysis of the gamma Dor pulsator HR 8799, showing resonances and amplitude variations
• On the role of resonances in polluting white dwarfs by asteroids
• The impact of pre-main sequence stellar evolution on midplane snowline locations and C/O in planet forming discs
• Orbital Migration of Protoplanets in a Marginally Gravitationally Unstable Disk
• Theoretical seismic properties of pre-main sequence gamma Doradus pulsators
• Orbiting a binary: SPHERE characterisation of the HD 284149 system
• Exploring the Brown Dwarf Desert with Precision Radial Velocities and Gaia DR3 Astrometric Orbits
• WEIRD: Wide-orbit Exoplanet search with InfraRed Direct imaging
• Constraining the presence of giant planets in two-belt debris disk systems with VLT/SPHERE direct imaging and dynamical arguments
• Laboratory and On-Sky Validation of the Shaped Pupil Coronagraph's Sensitivity to Low-Order Aberrations With Active Wavefront Control
• High Contrast Imaging in the Visible: First Experimental Results at the Large Binocular Telescope
• Spitzer Light Curves of the Young, Planetary-Mass TW Hya Members 2MASS J11193254-1137466AB and WISEA J114724.10-204021.3
• Linking the formation and fate of exo-Kuiper belts within solar system analogues
• Planets Around Low-Mass Stars (PALMS). II. A Low-Mass Companion to the Young M Dwarf GJ 3629 Separated By 0.2"
• The TW Hya Rosetta Stone Project IV: A hydrocarbon rich disk atmosphere
• Rave: A non-parametric method for recovering the surface brightness and height profiles of edge-on debris disks
• HD 117214 debris disk: scattered-light images and constraints on the presence of planets
• A Deep Keck/NIRC2 Search for Thermal Emission from Planetary Companions Orbiting Fomalhaut
• The ALMA survey to Resolve exoKuiper belt Substructures (ARKS) I: Motivation, sample, data reduction, and results overview
• Direct-imaging Discovery of a Substellar Companion Orbiting the Accelerating Variable Star, HIP 39017
• Imaged sub-stellar companions: not as eccentric as they appear? The effect of an unseen inner mass on derived orbits
• Phase Quantization Study of Spatial Light Modulator for Extreme High contrast Imaging
• First Doppler Limits on Binary Planets and Exomoons in the HR 8799 System
• Dust Spreading in Debris Discs: Do Small Grains Cling on to Their Birth Environment?
• Modelling the Inner Debris Disc of HR 8799
• Properties of the single Jovian planet population and the pursuit of Solar system analogues
• Shaping HR8799's outer dust belt with an unseen planet
• Thermal Infrared Imaging and Atmospheric Modeling of VHS J125601.92-125723.9 b: Evidence for Moderately Thick Clouds and Equilibrium Carbon Chemistry in a Hierarchical Triple System
• Prospects for Directly Imaging Young Giant Planets at Optical Wavelengths
• One-third of Sun-like stars are born with misaligned planet-forming disks
• High contrast imaging at the LBT: the LEECH exoplanet imaging survey
• Iterative Angular Differential Imaging (IADI): An exploration of recovering disk structures in scattered light with an iterative ADI approach
• Radial Velocity Variability of Field Brown Dwarfs
• Combining angular differential imaging and accurate polarimetry with SPHERE/IRDIS to characterize young giant exoplanets
• Formation of wide-orbit giant planets in protoplanetary disks with a decreasing pebble flux
• Inner edges of planetesimal belts: collisionally eroded or truncated?
• Searching for Gas Giant Planets on Solar System Scales: VLT NACO/APP Observations of the Debris Disk Host Stars HD172555 and HD115892
• Restrictions on the Growth of Gas Giant Cores via Pebble Accretion
• Exoplanetary Geophysics -- An Emerging Discipline
• Ultracool Dwarfs Observed with the Spitzer Infrared Spectrograph. I. An Accurate Look at the L-to-T Transition at $\sim$300 Myr from Optical through Mid-infrared Spectrophotometry
• Atmospheric characterization of cold exoplanets using a 1.5-m coronagraphic space telescope
• The GALAH Survey: Lithium-strong KM dwarfs
• First Comparative Exoplanetology Within a Transiting Multi-planet System: Comparing the atmospheres of V1298 Tau b and c
• Migration of accreting planets in radiative discs from dynamical torques
• In-depth direct imaging and spectroscopic characterization of the young Solar System analog HD 95086
• NIRISS aperture masking interferometry: an overview of science opportunities
• Measuring the variability of directly imaged exoplanets using vector Apodizing Phase Plates combined with ground-based differential spectrophotometry
• A High-contrast Imaging Algorithm: Optimized Image Rotation and Subtraction
• Climate Change and Astronomy: A Look at Long-Term Trends on Maunakea
• Gas-Assisted Growth of Protoplanets in a Turbulent Medium
• AB Aurigae: Possible evidence of planet formation through the gravitational instability
• A decade of radial-velocity monitoring of Vega and new limits on the presence of planets
• A new sub-stellar companion around the young star HD 284149
• Mutual inclinations between giant planets and their debris discs in HD 113337 and HD 38529
• Orbital migration of giant planets induced by gravitationally unstable gaps: the effect of planet mass
• L-band Spectroscopy with Magellan-AO/Clio2: First Results on Young Low-Mass Companions
• The Demographics of Wide-Separation Planets
• Revisiting the Helium and Hydrogen Accretion Indicators at TWA 27B: Weak Mass Flow at Near-Freefall Velocity
• Project 1640 Observations of Brown Dwarf GJ 758 B: Near-Infrared Spectrum and Atmospheric Modeling
• Characterizing the Chemistry of Planetary Materials Around White Dwarf Stars
• Constraints on the nearby exoplanet $\epsilon$ Ind Ab from deep near/mid-infrared imaging limits
• Resolving the outer ring of HD 38206 using ALMA and constraining limits on planets in the system
• The compositions of the HR 8799 planets reflect accretion of both solids and metal-enriched gas
• New constraints on the HR 8799 planetary system from mid-infrared direct imaging
• Development of a subwavelength grating vortex coronagraph of topological charge 4 (SGVC4)
• Improved Contrast in Images of Exoplanets using Direct SNR Optimization
• The unstable fate of the planet orbiting the A-star in the HD 131399 triple stellar system
• Trade-offs in high-contrast integral field spectroscopy for exoplanet detection and characterisation: Young gas giants in emission
• Direct Imaging Discovery of a Young Brown Dwarf Companion to an A2V Star
• Constraints on the substellar companions in wide orbits around the Barnard's Star from CanariCam mid-infrared imaging
• A New Method for Characterizing Very-Low-Mass Companions with Low Resolution Near-Infrared Spectroscopy
• The Feasibility of Directly Imaging Nearby Cold Jovian Planets with MIRI/JWST
• Direct Imaging discovery of a second planet candidate around the possibly transiting planet host CVSO 30
• The post-main-sequence fate of the HR 8799 planetary system
• Building hybridized 28-baseline pupil-remapping photonic interferometers for future high resolution imaging
• The Scorpion Planet Survey: Wide-Orbit Giant Planets Around Young A-type Stars
• Radio emission in a nearby ultracool dwarf binary: a multi-frequency study
• Low-mass members of nearby young stellar moving groups from Gaia EDR3
• Disentangling the parameter space: The role of planet multiplicity in triggering dynamical instabilities on planetary systems around white dwarfs
• The Lick-Carnegie Survey: A New Two-Planet System Around the Star HD 207832
• High-contrast imaging constraints on gas giant planet formation - The Herbig Ae/Be star opportunity
• Near-Infrared Image of the Debris Disk around HD 15115
• The link between infall location, early disc size, and the fraction of self-gravitationally fragmenting discs
• SCExAO and Keck Direct Imaging Discovery of a Low-Mass Companion Around the Accelerating F5 Star HIP 5319
• Impacts of high-contrast image processing on atmospheric retrievals
• Multi-modal atmospheric characterization of $\beta$ Pictoris b: Adding high-resolution continuum spectra from GRAVITY
• On-Sky Operations with the ALES Integral Field Spectrograph
• Search for giant planets around seven white dwarfs in the Hyades cluster with the Hubble Space Telescope
• Spectral and angular differential imaging with SPHERE/IFS. Assessing the performance of various PCA-based approaches to PSF subtraction
• Portable Adaptive Optics for Exoplanet Imaging
• K2-HERMES II. Planet-candidate properties from K2 Campaigns 1-13
• Lack of close-in, massive planets of main-sequence A-type stars from Kepler
• The dynamical structure of HR 8799's inner debris disk
• Sparse aperture masking at the VLT II. Detection limits for the eight debris disks stars $\beta$ Pic, AU Mic, 49 Cet, $\eta$ Tel, Fomalhaut, g Lup, HD181327 and HR8799
• Mid-infrared characterization of the planetary-mass companion ROXs 42B b
• Circumstellar discs: What will be next?
• Development of models for nearby young stellar moving groups: creation, revision, and finalisation of the models
• Exploring the directly imaged HD 1160 system through spectroscopic characterization and high-cadence variability monitoring
• Direct Imaging in the Habitable Zone and the Problem of Orbital Motion
• Polarization of stars with debris disks: comparing observations with models
• Zodiacal Exoplanets in Time (ZEIT) XII: A Directly-Imaged Planetary-Mass Companion to a Young Taurus M Dwarf Star
• Formation of Giant Planets
• Limits on the presence of planets in systems with debris disks: HD 92945 and HD 107146
• Breaking degeneracies in exoplanetary parameters through self-consistent atmosphere-interior modelling
• High resolution ALMA and HST imaging of $\kappa$CrB: a broad debris disc around a post-main sequence star with low-mass companions
• Mapping the Skies of Ultracool Worlds: Detecting Storms and Spots with Extremely Large Telescopes
• An inner warp discovered in the disk around HD 110058 using VLT/SPHERE and HST/STIS
• A High-Resolution Spectroscopic Survey of Directly Imaged Companion Hosts: I. Determination of diagnostic stellar abundances for planet formation and composition
• DIPSY: A new Disc Instability Population SYnthesis, II. The Populations of Companions Formed Through Disc Instability
• Architecture of three-planet systems predicted from the observed protoplanetary disk of HL Tau
• Evidence for planetary hypothesis for PTFO 8-8695b with five-year optical/infrared monitoring observations
• Imaging of exocomets with infrared interferometry
• Clusters: age scales for stellar physics
• A deep search for planets in the inner 15 au around Vega
• ISPY - the NaCo Imaging Survey for Planets around Young stars: A young companion candidate embedded in the R CrA cloud
• MIRACLES: atmospheric characterization of directly imaged planets and substellar companions at 4-5 $\mu$m. II. Constraints on the mass and radius of the enshrouded planet PDS 70 b
• Narrow belt of debris around the Sco-Cen star HD 141011
• Detecting Biosignatures in Nearby Rocky Exoplanets using High-Contrast Imaging and Medium-Resolution Spectroscopy with Extremely Large Telescope
• Characterization of debris disks observed with SPHERE
• Migration jumps of planets in transition disks
• Keplerian motion of a compact source orbiting the inner disc of PDS 70: a third protoplanet in resonance with b and c?
• COol Companions ON Ultrawide orbiTS (COCONUTS). III. A Very Red L6 Benchmark Brown Dwarf around a Young M5 Dwarf
• Near-IR observations of the young star [BHB2007]-1: A sub-stellar companion opening the gap in the disk
• The Ophiuchus DIsk Survey Employing ALMA (ODISEA): A Unified Evolutionary Sequence of Planet-Driven Substructures Explaining the Diversity of Disk Morphologies
• Atmospheric Characterization and Further Orbital Modeling of $\kappa$ And b
• Very Large Telescope observations of Gomez's Hamburger: Insights into a young protoplanet candidate
• Experimental and on-sky demonstration of spectrally dispersed wavefront sensing using a photonic lantern
• Unveiling wide-orbit companions to K-type stars in Sco-Cen with Gaia EDR3
• Confirming the least massive members of the Pleiades star cluster
• Intermediate mass T Tauri disk masses and a comparison to their Herbig disk descendants
• Exoplanet Atmosphere Measurements from Direct Imaging
• The formation of low-mass stars and brown dwarfs
• Applying a temporal systematics model to vector Apodizing Phase Plate coronagraphic data: TRAP4vAPP
• Early High-contrast Imaging Results with Keck/NIRC2-PWFS: The SR 21 Disk
• Emerging population of gap-opening planets around type-A stars -- Long-term evolution of the forming planets around HD 163296
• Post-processing CHARIS integral field spectrograph data with PyKLIP
• Searching for wide-orbit gravitational instability protoplanets with ALMA in the dust continuum
• NA-SODINN: a deep learning algorithm for exoplanet image detection based on residual noise regimes
• PACOME: Optimal multi-epoch combination of direct imaging observations for joint exoplanet detection and orbit estimation
• A complete Herbig disk mass survey in Orion
• Planet formation: key mechanisms and global models
• Very-wide-orbit planets from dynamical instabilities during the stellar birth cluster phase
• Enrichment of the HR 8799 planets by minor bodies and dust
• High-contrast spectroscopy with the new VLT/ERIS instrument: Molecular maps and radial velocity of the gas giant AF Lep b
• On the survivability of a population of gas giant planets on wide orbits
• The Direct Mid-Infrared Detectability of Habitable-zone Exoplanets Around Nearby Stars
• Pebble accretion in self-gravitating protostellar discs
• Small and Close-In Planets are Uncommon Around A-type Stars
• Mathematical encoding within multi-resonant planetary systems as SETI beacons
• WIde Separation Planets In Time (WISPIT): Two directly imaged exoplanets around the Sun-like stellar binary WISPIT 1
• The paradox of youth for ALMA planet candidates
• One of Everything: The Breakthrough Listen Exotica Catalog
• Distinct Rotational Evolution of Giant Planets and Brown Dwarf Companions
• Planet Formation
• Combining Photometry and Astrometry to Improve Orbit Retrieval of Directly Imaged Exoplanets
• VLT/SPHERE survey for exoplanets around young, early-type stars including systems with multi-belt architectures
• An optimised survey strategy for the ERIS/NIX imager: searching for young giant exoplanets and very low mass brown dwarfs using the K-peak custom photometric filter
• A multi-technique detection of an eccentric giant planet around accelerating star HD 57625
• Searching for the HR 8799 Debris Disk with HST/STIS
• Companions of Stars: From Other Stars to Brown Dwarfs to Planets: The Discovery of the First Methane Brown Dwarf
• New Astronomy Reviews Special Issue: History of Kepler's Major Exoplanet "Firsts"
• Exoplanet Imaging Data Challenge, phase II: Characterization of exoplanet signals in high-contrast images
• Evolution of Planetary Chaotic Zones in Planetesimal Disks
• Signpost of Multiple Planets in Debris Disks
• Active focal-plane coronagraphy with liquid-crystal spatial-light modulators: Broadband contrast performance in the visible
• OASIS Survey Direct Imaging and Astrometric Discovery of HIP 71618 B: A Substellar Companion Suitable for the Roman Coronagraph Technology Demonstration
• The Programmable Liquid-crystal Active Coronagraphic Imager for the DAG telescope (PLACID) instrument: On-site status update ahead of first light
• K-Stacker, an algorithm to hack the orbital parameters of planets hidden in high-contrast imaging. First applications to VLT SPHERE multi-epoch observations
• A general polarimetric model for transiting and non-transiting ringed exoplanets
• Direct Imaging Discovery of Giant Exoplanet $\beta$ Pictoris d: A Decade-Long Game of Hide-and-Seek
• Debris Disks in Nearby Young Moving Groups in the ALMA Era
• High contrast imaging of exoplanets on ELTs using a super-Nyquist wavefront control scheme
• Stability of a cluster-disrupted mean-motion resonance (chain) in HR 8799 and PDS 70
• The formation of planets by disc fragmentation
• Apache Point Observatory follow-up of ACcelerating Candidate ExopLanet host Stars (APO ACCELS): Ages for 166 Accelerating Stars in the Northern Hemisphere
• Dust growth and planet formation by disc fragmentation
• A Mid-Infrared Search for Substellar Companions of Nearby Planet-Host Stars
• Detecting Exoplanets Using Eclipsing Binaries as Natural Starshades
• Observational signatures of the giant planets collisions
• Evolution and Observable Properties of Rocky Planet Atmospheres
• Why Does Nature Form Exoplanets Easily?
• Nearby Young Stars and Young Moving Groups
• Photoevaporation of protoplanetary disks by Far-UV photons arising from neighbouring massive stars: observation of proplyds and modelling
• Performance and Early Science with the Subaru Coronagraphic Extreme Adaptive Optics Project
• On-sky performance and recent results from the Subaru coronagraphic extreme adaptive optics system
• Longterm Stability of Planetary Systems formed from a Transitional Disk
• A search for transits among the δ Scuti variables in Kepler
• Searching for Embedded Protoplanets with the Keck/NIRC2 Vortex Coronagraph: Confirmation of a Core-accretion Planet in the Narrow Gap of the Elias 2-24 Disk
• The Directly-Imaged Exoplanet Host Star 51 Eridani is a Gamma Doradus Pulsator
• L-band Integral Field Spectroscopy of the HR 8799 Planetary System
• Adaptive Optics Observations of Exoplanets, Brown Dwarfs, & Binary Stars
• A New Type of Exoplanet Direct Imaging Search: The SCExAO/CHARIS Survey of Accelerating Stars
• Two decades of Exoplanetary Science with Adaptive Optics
• Resolving the large exoKuiper belt of the HD 126062 debris disc and extended gas emission in its vicinity
• Original use of MUSE's laser tomography adaptive optics to directly image young accreting exoplanets