Detection of an Extrasolar Planet Atmosphere

Abstract

We report high precision spectrophotometric observations of four planetary transits of HD 209458, in the region of the sodium resonance doublet at 589.3 nm. We find that the photometric dimming during transit in a bandpass centered on the sodium feature is deeper by (2.32 +/- 0.57) x 10^{-4} relative to simultaneous observations of the transit in adjacent bands. We interpret this additional dimming as absorption from sodium in the planetary atmosphere, as recently predicted from several theoretical modeling efforts. Our model for a cloudless planetary atmosphere with a solar abundance of sodium in atomic form predicts more sodium absorption than we observe. There are several possibilities that may account for this reduced amplitude, including reaction of atomic sodium into molecular gases and/or condensates, photoionization of sodium by the stellar flux, a low primordial abundance of sodium, or the presence of clouds high in the atmosphere.

26 pages, 8 figures, accepted by ApJ 2001 November 19

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• A Theory of Exoplanet Transits with Light Scattering
• A Search for H-alpha Absorption in the Exosphere of the Transiting Extrasolar Planet HD 209458b
• JWST transmission spectroscopy of HD 209458b: a super-solar metallicity, a very low C/O, and no evidence of CH4, HCN, or C2H2
• A Hubble Space Telescope transit light curve for GJ436b
• Detection of Intermediate-Period Transiting Planets with a Network of Small Telescopes: transitsearch.org
• Multiple Companions to HD 154857 and HD 160691
• Modeling magnesium escape from HD209458b atmosphere
• Two regimes of interaction of a Hot Jupiter's escaping atmosphere with the stellar wind and generation of energized atomic hydrogen corona
• Solar System Physics for Exoplanet Research
• Searching for Transiting Planets in Stellar Systems
• Laboratory spectra of hot molecules: data needs for hot super-Earth exoplanets
• The GAPS Programme with HARPS-N at TNG. XXXV. Fundamental properties of transiting exoplanet host stars
• Three Small Super-Earths Transiting the nearby star GJ 9827
• Non-Detection of Polarized, Scattered Light from the HD 189733b Hot Jupiter
• Transmission spectroscopy of the inflated exoplanet WASP-52b, and evidence for a bright region on the stellar surface
• Physical properties and radius variations in the HAT-P-5 planetary system from simultaneous four-colour photometry
• Non-Detection of L-band Line Emission from the Exo-Planet HD189733b
• HAT-P-50b, HAT-P-51b, HAT-P-52b, and HAT-P-53b: Three Transiting Hot Jupiters and a Transiting Hot Saturn From the HATNet Survey
• A Spitzer Infrared Radius for the Transiting Extrasolar Planet HD209458b
• A Model of the H$\alpha$ and Na Transmission Spectrum of HD 189733b
• LRG-BEASTS: transmission spectroscopy and retrieval analysis of the highly-inflated Saturn-mass planet WASP-39b
• Precise Estimates of the Physical Parameters for the Exoplanet System HD-17156 Enabled by HST FGS Transit and Asteroseismic Observations
• On The Compatibility of Ground-based and Space-based Data: WASP-96 b, An Example
• Fast identification of transits from light-curves
• Potassium detection in the clear atmosphere of a hot-Jupiter: FORS2 transmission spectroscopy of WASP-17b
• WASP-127b transmission spectrum]{Abundance measurements of H${}_2$O and carbon-bearing species in the atmosphere of WASP-127b confirm its super-solar metallicity
• A comparison of chemical models of exoplanet atmospheres enabled by TauREx 3.1
• Signs of strong Na and K absorption in the transmission spectrum of WASP-103b
• WASP-25b: a 0.6 M_J planet in the Southern hemisphere
• IRSF SIRIUS JHKs Simultaneous Transit Photometry of GJ1214b
• WASP-38b: A Transiting Exoplanet in an Eccentric, 6.87d Period Orbit
• Evolution of atmospheric escape in close-in giant planets and their associated Ly$\alpha$ and H$\alpha$ transit predictions
• On Atmospheric Retrievals of Exoplanets with Inhomogeneous Terminators
• Detecting bio-markers in habitable-zone earths transiting white dwarfs
• On the Selection of Photometric Planetary Transits
• Infrared Observations During the Secondary Eclipse of HD 209458b: I. 3.6-Micron Occultation Spectroscopy Using the VLT
• Transit Target Selection Using Reduced Proper Motions
• Exoplanet Chemistry
• The Impact of Circumplantary Jets on Transit Spectra and Timing Offsets for Hot-Jupiters
• High resolution transmission spectrum of the Earth's atmosphere -- Seeing Earth as an exoplanet using a lunar eclipse
• Investigating the physical properties of transiting hot Jupiters with the 1.5-m Kuiper Telescope
• Planetpol polarimetry of the exoplanet systems 55 Cnc and tau Boo
• Near-ultraviolet Transmission Spectroscopy of HD 209458b: Evidence of Ionized Iron Beyond the Planetary Roche Lobe
• High precision transit observations of the exoplanet WASP-13b with the RISE instrument
• HATS-5b: A Transiting hot-Saturn from the HATSouth Survey
• Massive Satellites of Close-In Gas Giant Exoplanets
• The Hubble PanCET program: Transit and Eclipse Spectroscopy of the Strongly Irradiated Giant Exoplanet WASP-76b
• Transit spectrophotometry of the exoplanet HD189733b. II. New Spitzer observations at 3.6 microns
• CHEOPS geometric albedo of the hot Jupiter HD 209458b
• Venus transit 2004: Illustrating the capability of exoplanet transmission spectroscopy
• Nitrogen Dioxide Pollution as a Signature of Extraterrestrial Technology
• Transmission spectroscopy of HAT-P-32b with the LBT: confirmation of clouds/hazes in the planetary atmosphere
• The Dawes Review 3: The Atmospheres of Extrasolar Planets and Brown Dwarfs
• Detecting Reflected Light from Close-In Extrasolar Giant Planets with the Kepler Photometer
• Detecting Life-bearing Extra-solar Planets with Space Telescopes
• Robustness Measures for Molecular Detections using High-Resolution Transmission Spectroscopy of Exoplanets
• Alkaline Exospheres of Exoplanet Systems: Evaporative Transmission Spectra
• LRG-BEASTS III: Ground-based transmission spectrum of the gas giant orbiting the cool dwarf WASP-80
• Broadband near-infrared astronomical spectrometer calibration and on-sky validation with an electro-optic laser frequency comb
• Molecular Detectability in Exoplanetary Emission Spectra
• Susceptibility of planetary atmospheres to mass loss and growth by planetesimal impacts: the impact shoreline
• HST/WFC3 transmission spectroscopy of the cold rocky planet TRAPPIST-1h
• The White Dwarf Opportunity: Robust Detections of Molecules in Earth-like Exoplanet Atmospheres with the James Webb Space Telescope
• A 0.8-2.4 Micron Transmission Spectrum of the Hot Jupiter CoRoT-1b
• Detecting ring systems around exoplanets using high resolution spectroscopy: the case of 51Pegb
• Detection of Na, K and H${}_2$O in the hazy atmosphere of WASP-6b
• The Hubble PanCET program: An extensive search for metallic ions in the exosphere of GJ 436 b
• Near-Infrared Emission Spectrum of WASP-103b using Hubble Space Telescope/Wide Field Camera 3
• Detection of sodium absorption in WASP-17b with Magellan
• The Implications of M Dwarf Flares on the Detection and Characterization of Exoplanets at Infrared Wavelengths
• Investigation of the environment around close-in transiting exoplanets using CLOUDY
• On the Application of Bayesian Leave-One-Out Cross-Validation to Exoplanet Atmospheric Analysis
• KELT-16b: A highly irradiated, ultra-short period hot Jupiter nearing tidal disruption
• Modern optical astronomy: technology and impact of interferometry
• HST/STIS Lyman-alpha observations of the quiet M dwarf GJ436: Predictions for the exospheric transit signature of the hot neptune GJ436b
• Constraining Hot Jupiter Atmospheric Structure and Dynamics through Doppler Shifted Emission Spectra
• Gemini/GMOS Optical Transmission Spectroscopy of WASP-121b: signs of variability in an ultra-hot Jupiter?
• High-resolution transmission spectroscopy of four hot inflated gas giant exoplanets
• Exoplanet Atmosphere Measurements from Transmission Spectroscopy and other Planet-Star Combined Light Observations
• Optical transmission photometry of the highly inflated exoplanet WASP-17b
• Probing potassium in the atmosphere of HD 80606b with tunable filter transit spectrophotometry from the Gran Telescopio Canarias
• Gemini/GMOS Transmission Spectral Survey: Complete Optical Transmission Spectrum of the hot Jupiter WASP-4b
• A Non-isothermal Theory for Interpreting Sodium Lines in Transmission Spectra of Exoplanets
• TOI-481 b & TOI-892 b: Two long period hot Jupiters from the Transiting Exoplanet Survey Satellite
• The Mantis Network III: Expanding the limits of chemical searches within ultra hot-Jupiters. New detections of Ca I, V I, Ti I, Cr I, Ni I, Sr II, Ba II, and Tb II in KELT-9 b
• Exoplanet Transit Parallax
• Early Insights for Atmospheric Retrievals of Exoplanets using JWST Transit Spectroscopy
• An observational signature of evolved oceans on extra-solar terrestrial planets
• Photometric observation of HAT-P-16b in the near-UV
• KELT-4Ab: An inflated Hot Jupiter transiting the bright (V~10) component of a hierarchical triple
• Characterizing Long-Period Transiting Planets Observed by Kepler
• High-precision K-band photometry of the secondary eclipse of HD209458
• The GTC exoplanet transit spectroscopy survey. VI. A spectrally-resolved Rayleigh scattering slope in GJ 3470b
• A Photometric Survey for Variables and Transits in the Field of Praesepe with KELT
• Probing Structures of Distant Extrasolar Planets with Microlensing
• H-alpha and Ca II Infrared Triplet Variations During a Transit of the 23 Myr Planet V1298 Tau c
• Electrodynamics on extrasolar giant planets
• GTC OSIRIS transiting exoplanet atmospheric survey: detection of potassium in HAT-P-1b from narrowband spectrophotometry
• A Search for FeH in Hot-Jupiter Atmospheres with High-Dispersion Spectroscopy
• The HST PanCET Program: Hints of Na I & Evidence of a Cloudy Atmosphere for the Inflated Hot Jupiter WASP-52b
• Characterizing Transiting Extrasolar Planets with Narrow-Band Photometry and GTC/OSIRIS
• Models of Neptune-Mass Exoplanets: Emergent Fluxes and Albedos
• Characterization of the HD 17156 planetary system
• Five New Transits of the Super-Neptune HD 149026
• Simultaneous follow-up of planetary transits: revised physical properties for the planetary systems HAT-P-16 and WASP-21
• Hot NH3 Spectra for Astrophysical Applications
• Constraining the interior of extrasolar giant planets with the tidal Love number k_2 using the example of HAT-P-13b
• Atmospheric escape by magnetically driven wind from gaseous planets
• Measuring the D/H Ratios of Exoplanets and Brown Dwarfs
• Examining the broadband emission spectrum of WASP-19b: A new z band eclipse detection
• A feature-rich transmission spectrum for WASP-127b
• The influence of forward-scattered light in transmission measurements of (exo)planetary atmospheres
• HST PanCET Program: A Complete Near-UV to Infrared Transmission Spectrum for the Hot Jupiter WASP-79b
• The GTC exoplanet transit spectroscopy survey II: An overly-large Rayleigh-like feature for exoplanet TrES-3b
• The centre-to-limb variations of solar Fraunhofer lines imprinted upon lunar eclipse spectra - Implications for exoplanet transit observations
• A data-driven approach to constraining the atmospheric temperature structure of KELT-9b
• Contamination from a nearby star cannot explain the anomalous transmission spectrum of the ultra-short period giant planet WASP-103b
• Magnetodynamo Lifetimes for Rocky, Earth-Mass Exoplanets with Contrasting Mantle Convection Regimes
• Transmission photometry of WASP-12b: simultaneous measurement of the planetary radius in three bands
• K-band transit and secondary eclipse photometry of exoplanet OGLE-TR-113b
• Revisiting the potassium feature of WASP-31b at high-resolution
• Searching for Planetary Transits in Galactic Open Clusters: EXPLORE/OC
• The GTC exoplanet transit spectroscopy survey. IV. Confirmation of the flat transmission spectrum of HAT-P-32b
• Upper limits on the hot Jupiter fraction in the field of NGC 7789
• Discriminating Between Cloudy, Hazy and Clearsky Exoplanets Using Refraction
• Exoplanet Spectroscopy with JWST NIRISS: Diagnostics and Case Studies
• Optimizing exoplanet atmosphere retrieval using unsupervised machine-learning classification
• Ozone chemistry on tidally locked M dwarf planets
• A survey of sodium absorption in ten giant exoplanets with high-resolution transmission spectroscopy
• A Comprehensive Analysis of WASP-17b's Transmission Spectrum from Space-Based Observations
• The GTC exoplanet transit spectroscopy survey XI. Possible detection of Rayleigh scattering in the atmosphere of the Saturn-mass planet WASP-69b
• Aura-3D: A Three-dimensional Atmospheric Retrieval Framework for Exoplanet Transmission Spectra
• JWST Transit Spectra I: Exploring Potential Biases and Opportunities in Retrievals of Tidally-locked Hot Jupiters with Clouds and Hazes
• Clear and Cloudy Exoplanet Forecasts for JWST: Maps, Retrieved Composition and Constraints on Formation with MIRI and NIRCam
• Radiation-Hydrodynamics of Hot Jupiter Atmospheres
• Diagnosing aerosols in extrasolar giant planets with cross-correlation function of water bands
• Is the atmosphere of the ultra-hot Jupiter WASP-121b variable?
• The HST PanCET Program: An Optical to Infrared Transmission Spectrum of HAT-P-32Ab
• Large Binocular Telescope view of the atmosphere of GJ1214b
• An Information-Theoretic Approach to Optimize JWST Observations and Retrievals of Transiting Exoplanet Atmospheres
• Tidally Distorted Exoplanets: Density Corrections for Short-Period Hot-Jupiters based solely on Observable Parameters
• The EChO science case
• Spectroscopic characterization of the atmospheres of potentially habitable planets: GL 581 d as a model case study
• High-precision multi-wavelength eclipse photometry of the ultra-hot gas giant exoplanet WASP-103 b
• Further constraints on the optical transmission spectrum of HAT-P-1b
• The UNSW Extrasolar Planet Search: Methods and First Results from a Field Centred on NGC 6633
• $\text{PyTranSpot}$ - A tool for multiband light curve modeling of planetary transits and stellar spots
• Mineral snowflakes on exoplanets and brown dwarfs: Effects of micro-porosity, size distributions, and particle shape
• Young Exoplanet Transit Initiative (YETI)
• The Transit Transmission Spectrum of a Cold Gas Giant Planet
• Physical properties of the WASP-44 planetary system from simultaneous multi-colour photometry
• Near-IR transmission spectrum of HAT-P-32 b using HST/WFC3
• Direct Measure of Radiative and Dynamical Properties of an Exoplanet Atmosphere
• A New Concept for Spectro-photometry of Exoplanets with Space-based Telescopes
• The potassium absorption on HD189733b and HD209458b
• Phase curve pollution of exoplanet transmission spectra
• Ground-Based Transmission Spectroscopy with FORS2: A featureless optical transmission spectrum and detection of H${}_2$O for the ultra-hot Jupiter WASP-103b
• How Much Information Does the Sodium Doublet Encode? Retrieval Analysis of Non-LTE Sodium Lines at Low and High Spectral Resolutions
• Mid-Infrared Properties of Disk Averaged Observations of Earth with AIRS
• Narrow-Angle Astrometry with the Space Interferometry Mission: The Search for Extra-solar Planets. I. Detection and Characterization of Single Planets
• ESPRESSO on VLT: An Instrument for Exoplanet Research
• LRG-BEASTS: sodium absorption and Rayleigh scattering in the atmosphere of WASP-94A b using NTT/EFOSC2
• The Search for Extrasolar Earth-like planets
• Ground-based, Near-infrared Exospectroscopy. II. Tentative Detection of Emission From the Extremely Hot Jupiter WASP-12b
• ACCESS: A Visual to Near-infrared Spectrum of the Hot Jupiter WASP-43b with Evidence of ${\mathrm{H}}_2\mathrm{O}$, but no evidence of Na or K
• ExTrA: Exoplanets in Transit and their Atmospheres
• The Search for an Atmospheric Signature of the Transiting Exoplanet HD 149026b
• Exploring the Potential of Integral Field Spectroscopy Observing Extrasolar Planet Transits: Ground Based Observations of the Atmospheric Na in HD209458b
• Transiting Exoplanet Monitoring Project (TEMP). VI. The Homogeneous Refinement of System Parameters for 39 Transiting Hot Jupiters with 127 New Light Curves
• High-Resolution Transit Spectroscopy of Warm Saturns
• Detecting transit signatures of exoplanetary rings using SOAP3.0
• Helium absorption in exoplanet atmospheres is connected to stellar coronal abundances
• Models of Warm Jupiter Atmospheres: Observable Signatures of Obliquity
• Detectability of Chlorofluorocarbons in the Atmospheres of Habitable M-dwarf Planets
• HST/STIS transmission spectrum of the ultra-hot Jupiter WASP-76 b confirms the presence of sodium in its atmosphere
• Optimizing exoplanet transit searches around low-mass stars with inclination constraints
• Large Exomoons unlikely around Kepler-1625 b and Kepler-1708 b
• An empirical infrared transit spectrum of Earth: opacity windows and biosignatures
• Can 1D radiative equilibrium models of faculae be used for calculating contamination of transmission spectra?
• Scattered Light from Close-in Extrasolar Planets: Prospects of Detection with the MOST Satellite
• Integrating light-curve and atmospheric modelling of transiting exoplanets
• Variability due to climate and chemistry in observations of oxygenated Earth-analogue exoplanets
• Refined physical properties and g',r',i',z',J,H,K transmission spectrum of WASP-23b from the ground
• Narrow Band Halpha Photometry of the Super-Earth GJ 1214b with GTC/OSIRIS Tunable Filters
• A weak spectral signature of water vapour in the atmosphere of HD 179949 b at high spectral resolution in the L-band
• Broadband transmission spectroscopy of HD209458b with ESPRESSO: Evidence for Na, TiO, or both
• The Earth as an extrasolar transiting planet - II: HARPS and UVES detection of water vapor, biogenic O${}_2$, and O${}_3$
• Diagnosing limb asymmetries in hot and ultra-hot Jupiters with high-resolution transmission spectroscopy
• Connection between planetary He I $\lambda$10830 Å absorption and extreme-ultraviolet emission of planet-host stars
• LBT transmission spectroscopy of HAT-P-12b: confirmation of a cloudy atmosphere with no significant alkali features
• Modeling Indications of Technology in Planetary Transit Light Curves -- Dark-side illumination
• Hot Exoplanet Atmospheres Resolved with Transit Spectroscopy (HEARTS) VII. Detection of sodium on the long-transiting inflated sub-Saturn KELT-11 b
• Time-resolved UVES observations of a stellar flare on the planet host HD 189733 during primary transit
• A new dynamical modeling of the WASP-47 system with CHEOPS observations
• A comparative study of WASP-67b and HAT-P-38b from WFC3 data
• Outcome of Six Candidate Transiting Planets from a TrES Field in Andromeda
• SuperWASP-N Extra-solar Planet Candidates Between 18hr < RA < 21hr
• ACCESS: Ground-based Optical Transmission Spectroscopy of the Hot Jupiter WASP-4b
• Center-to-limb variation of spectral lines and continua observed with SST/CRISP and SST/CHROMIS
• A search for transiting extrasolar planet candidates in the OGLE-II microlens database of the galactic plane
• Impact of stellar flares on the chemical composition and transmission spectra of gaseous exoplanets orbiting M dwarfs
• Discovery of WASP-113b and WASP-114b, two inflated hot-Jupiters with contrasting densities
• The Spitzer search for the transits of HARPS low-mass planets - I. No transit for the super-Earth HD 40307b
• HORuS transmission spectroscopy of 55 Cnc e
• Defocussed Transmission Spectroscopy: A potential detection of sodium in the atmosphere of WASP-12b
• No Detectable H3+ Emission from the Atmospheres of Hot Jupiters
• The Magellan/PFS Exoplanet Search: A 55-day period dense Neptune transiting the bright ($V=8.6$) star HD 95338
• Characterizing the Atmospheres of the HR8799 Planets with HST/WFC3
• Exoplanet Transmission Spectroscopy using KMOS
• Repeatability of Spitzer/IRAC exoplanetary eclipses with Independent Component Analysis
• Possible detection of a bimodal cloud distribution in the atmosphere of HAT-P-32\,A\,b from multi-band photometry
• Lambda Boo Abundance Patterns: Accretion from Orbiting Sources
• The Hubble PanCET Program: A Metal-rich Atmosphere for the Inflated Hot Jupiter HAT-P-41b
• Exoplanetary Monte Carlo Radiative Transfer with Correlated-k I. Benchmarking Transit and Emission Observables
• Spectral Resolution-linked Bias in Transit Spectroscopy of Extrasolar Planets
• Assessing telluric correction methods for Na detections with high-resolution exoplanet transmission spectroscopy
• A Search for Sodium Absorption from Comets Around HD209458
• On the possibility of detecting extrasolar planets' atmospheres with the Rossiter-McLaughlin-effect
• A Temperature Trend for Clouds and Hazes in Exoplanets Atmospheres
• Physical properties of the planetary systems WASP-45 and WASP-46 from simultaneous multi-band photometry
• Transition properties of potassium atom
• Near infrared spectroscopic search for the close orbiting planet HD 75289b
• SuperWASP-North Extra-solar Planet Candidates between 3hr < RA < 6hr
• Transmission spectroscopy of the ultra-hot Jupiter MASCARA-4 b: Disentangling the hydrostatic and exospheric regimes of ultra-hot Jupiters
• The Thermal Emission Spectrum of the Nearby Rocky Exoplanet LTT 1445A b from JWST MIRI/LRS
• On spectroscopic phase-curve retrievals: H2 dissociation and thermal inversion in the atmosphere of the ultra-hot Jupiter WASP-103 b
• LRG-BEASTS: Ground-based Detection of Sodium and a Steep Optical Slope in the Atmosphere of the Highly Inflated Hot-Saturn WASP-21b
• Orbital parameters of extrasolar planets derived from polarimetry
• Evidence for chromium hydride in the atmosphere of Hot Jupiter WASP-31b
• On constraining a transiting exoplanet's rotation rate with its transit spectrum
• The Acceleration of Superrotation in Simulated Hot Jupiter Atmospheres
• Atmospheric properties of AF Lep b with forward modeling
• Two NIRCam channels are Better than One: How JWST Can Do More Science with NIRCam's Short-Wavelength Dispersed Hartmann Sensor
• A Possible New Transiting Planet
• Characterising Atmospheres of Cloudy Temperate Mini-Neptunes with JWST
• Simulated performance of the molecular mapping for young giant exoplanets with the Medium Resolution Spectrometer of JWST/MIRI
• Investigation of transit-selected exoplanet candidates from the MACHO survey
• WASP-147b, 160Bb, 164b and 165b: two hot Saturns and two Jupiters, including two planets with metal-rich hosts
• An enhanced slope in the transmission spectrum of the hot Jupiter WASP-104b
• Characterizing the atmospheres of transiting rocky planets around late type dwarfs
• Detection of Close-In Extrasolar Giant Planets Using the Fourier-Kelvin Stellar Interferometer
• Planet Mass and Metallicity: The Exoplanets and Solar System Connection
• Photoevaporative Flows From Exoplanet Atmospheres: A 3-D Radiative Hydrodynamic Parameter Study
• Narrow-Angle Astrometry with the Space Interferometry Mission: The Search for Extra-Solar Planets. II. Detection and Characterization of Planetary Systems
• Modeling synthetic spectra for transiting extrasolar giant planets: detectability of H${}_2$S and PH${}_3$ with JWST
• Kepler's Dark Worlds: a Low Albedo for an Ensemble of Neptunian and Terran Exoplanets
• A hot Saturn on an eccentric orbit around the giant star EPIC228754001
• The GTC exoplanet transit spectroscopy survey VIII. Flat transmission spectrum for the warm gas giant WASP-80
• A Framework for Characterizing Transmission Spectra of Exoplanets with Circumplanetary Rings
• Combined analysis of stellar and planetary absorption lines via global forward-transit simulations
• Testing connections between exo-atmospheres and their host stars. GEMINI-N/GMOS ground-based transmission spectrum of Qatar-1b
• A large range of haziness conditions in hot-Jupiter atmospheres
• The GTC exoplanet transit spectroscopy survey X. Stellar spots versus Rayleigh scattering: the case of HAT-P-11b
• JexoSim: A time domain simulator of exoplanet transit spectroscopy with JWST
• Global Chemical Transport on Hot Jupiters: Insights from 2D VULCAN photochemical model
• Ground-based photometry of the 21-day Neptune HD106315c
• Toroidal Atmospheres around Extrasolar Planets
• The orbit of Beta Pic b as a transiting planet
• The GAPS Programme at TNG. XXIX. No detection of reflected light from 51 Peg b using optical high-resolution spectroscopy
• The Effect of the Transit of Venus on ACRIM's Total Solar Irradiance Measurements: Implications for Transit Studies of Extrasolar Planets
• SuperWASP-North Extrasolar Planet Candidates. Candidates from Fields 17hr < RA < 18hr
• Ground-based optical transmission spectrum of the hot Jupiter HAT-P-1b
• Expanding the inventory of spectral lines used to trace atmospheric escape in exoplanets
• A Principal Component Analysis-based method to analyse high-resolution spectroscopic data
• Transmission spectroscopy with VLT FORS2: a featureless spectrum for the low-density transiting exoplanet WASP-88b
• An All-Sky Survey for the Detection of Transiting Extrasolar Planets and for Permanent Variable Star Tracking
• Ground-based Spectroscopy of the Exoplanet XO-2b using a Systematic Wavelength Calibration
• Planetary candidates transiting cool dwarf stars from Campaigns 12 to 15 of K2
• How to Characterize the Atmosphere of a Transiting Exoplanet
• Lowest Earth's atmosphere layers probed during a lunar eclipse
• Wayne - A Simulator for HST WFC3 IR Grism Spectroscopy
• Mineral Snowflakes on Exoplanets and Brown Dwarfs: Coagulation and Fragmentation of Cloud Particles with {\sc HyLandS}
• The Exosphere as a Boundary: Origin and Evolution of Airless Bodies in the Inner Solar System and Beyond Including Planets with Silicate Atmospheres
• The GTC exoplanet transit spectroscopy survey. VII. An optical transmission spectrum of WASP-48b
• Cherenkov Telescopes as Optical Telescopes for Bright Sources: Today's Specialised Thirty Metre Telescopes?
• uGMRT observations of the hot-Saturn WASP 69b: Radio-Loud Exoplanet-Exomoon Survey II (RLEES II)
• The atmosphere of WASP-17b: Optical high-resolution transmission spectroscopy
• A blind method to detrend instrumental systematics in exoplanetary light-curves
• Time Resolved Absorption of Six Chemical Species With MAROON-X Points to Strong Drag in the Ultra Hot Jupiter TOI-1518 b
• Role of the impact parameter in exoplanet transmission spectroscopy
• Is Beta Pic b the transiting planet of November 1981?
• Detection and Characterization of Extrasolar Planets through Doppler Spectroscopy
• Liverpool Telescope 2: a new robotic facility for rapid transient follow-up
• Detection limits of exoplanetary atmospheres with 2-m class telescopes
• The Concentration and Growth of Solids in Fragmenting Circumstellar Disks
• ExoSim: the Exoplanet Observation Simulator
• Non-Local Thermodynamic Equilibrium Transmission Spectrum Modelling of HD209458b
• Resolving nonuniform temperature distributions with single-beam absorption spectroscopy. Part II: Implementation from broadband spectra
• Exoplanetary Geophysics -- An Emerging Discipline
• Atmospheric Characterization of Hot Jupiter CoRoT-1 b Using the Wide Field Camera 3 on the Hubble Space Telescope
• Analysis of the planetary mass uncertainties on the accuracy of atmospherical retrieval
• Characterization of exoplanetary atmospheres with SLOPpy
• Qatar Exoplanet Survey: Qatar-6b -- a grazing transiting hot Jupiter
• Colour-magnitude diagrams of transiting Exoplanets -- III. A public code, nine strange planets, and the role of Phosphine
• JWST Transit Spectra II: Constraining Aerosol Species, Particle-size Distributions, Temperature, and Metallicity for Cloudy Exoplanets
• Two planetary systems with transiting Earth-size and super-Earth planets orbiting late-type dwarf stars
• Atmospheric mass loss of extrasolar planets orbiting magnetically active host stars
• A simple, quantitative method to infer the minimum atmospheric height of small exoplanets
• Exoplanets transmission spectroscopy: accounting for eccentricity and longitude of periastron. Superwinds in the upper atmosphere of HD209458b?
• Helium in Exoplanet Exospheres: Orbital and Stellar Influences
• Out-of-Transit Refracted Light in the Atmospheres of Transiting and Non-Transiting Exoplanets
• Knobs and dials of retrieving JWST transmission spectra. I. The importance of p-T profile complexity
• Prospects for Detecting Signs of Life on Exoplanets in the JWST Era
• Precovery of TESS Single Transits with KELT
• Tracing the formation and migration history: molecular signatures in the atmosphere of misaligned hot Jupiter WASP-94Ab using JWST NIRSpec/G395H
• Effects of Thermal Emission on the Transmission Spectra of Hot Jupiters
• Ground-based detection of the near-infrared emission from the dayside of WASP-5b
• HAT-P-58b -- HAT-P-64b: Seven Planets Transiting Bright Stars
• First exoplanet transit observation with the Stratospheric Observatory for Infrared Astronomy: Confirmation of Rayleigh scattering in HD 189733 b with HIPO
• Using near infra-red spectroscopy for characterization of transiting exoplanets
• KELT-23Ab: A Hot Jupiter Transiting a Near-Solar Twin Close to the TESS and JWST Continuous Viewing Zones
• Design Considerations for a Ground-Based Search for Transiting Planets around L and T Dwarfs
• Detection of faculae in the transit and transmission spectrum of WASP-69b
• An a priori investigation of astrophysical false positives in ground-based transiting planet surveys
• Atmospheric Characterization via Broadband Color Filters on the PLAnetary Transits and Oscillations of stars (PLATO) Mission
• ACCESS: An optical transmission spectrum of the high-gravity, hot Jupiter HAT-P-23b
• Detecting "Temperate" Jupiters: The Prospects of Searching for Transiting Gas Giants in Habitability Zones
• A Broadband Scalar Vortex Coronagraph
• Recovering the colour-dependent albedo of exoplanets with high-resolution spectroscopy: from ESPRESSO to the ELT
• Detection of Na and K in the atmosphere of the hot Jupiter HAT-P-1b with P200/DBSP
• Measuring accurate transit parameters
• Probing the atmosphere of HD189733b with the Na I and K I lines
• A CRIRES-search for H3+ emission from the hot Jupiter atmosphere of HD 209458 b
• A precise blue-optical transmission spectrum from the ground: Evidence for haze in the atmosphere of WASP-74b
• On the Effect of Stellar Activity on Low-resolution Transit Spectroscopy and the Use of High Resolution as Mitigation
• WASP-35 and HAT-P-30/WASP-51: re-analysis using TESS and ground-based transit photometry
• Tentative detection of titanium oxide in the atmosphere of WASP-69 b with a 4m ground-based telescope
• CaRM: Exploring the chromatic Rossiter-McLaughlin effect. The cases of HD 189733b and WASP-127b
• A New Definition of Exoplanet Habitability: Introducing the Photosynthetic Habitable Zone
• The Transit Timing and Atmosphere of Hot Jupiter HAT-P-37b
• A SEA BASS on the exoplanet HD209458b
• Polarimetric investigation of selected cloud compositions in exoplanetary atmospheres
• Detecting and Characterizing Water Vapor in the Atmospheres of Earth Analogs through Observation of the 0.94 Micron Feature in Reflected Light
• An Empirical Bayesian Approach to Limb-darkening in Modeling WASP-121b Transit Light Curves
• LRG-BEASTS: Evidence for clouds in the transmission spectrum of HATS-46 b
• Instrumentation prospects for rocky exoplanet atmospheres studies with high resolution spectroscopy
• Modeling of Closure Phase Measurements with AMBER/VLTI - Towards Characterization of Exoplanetary Atmospheres
• JexoSim 2.0: End-to-End JWST Simulator for Exoplanet Spectroscopy -- Implementation and Case Studies
• Probing Na in giant exoplanets with ESPRESSO and 3D NLTE stellar spectra
• Detecting Biosignatures in Nearby Rocky Exoplanets using High-Contrast Imaging and Medium-Resolution Spectroscopy with Extremely Large Telescope
• Starry Messages: Searching for Signatures of Interstellar Archaeology
• Can We Probe the Atmospheric Composition of an Extrasolar Planet from its Reflection Spectrum in a High-Magnification Microlensing Event?
• The extrasolar planet atmosphere and exosphere: Emission and transmission spectroscopy
• A search for transiting planets in the $\beta$ Pictoris system
• Monitoring of the D Doublet of Neutral Sodium during Transits of Two "Evaporating" Planets
• HORuS transmission spectroscopy and revised planetary parameters of KELT-7b
• SOAPv4: A new step toward modeling stellar signatures in exoplanet research
• Exoplanet-atmospheres at high spectral resolution: A CRIRES survey of hot-Jupiters
• The curse of clouds
• Characterization of exoplanetary atmospheres through a model-unbiased spectral survey methodology
• Physical properties and optical-infrared transmission spectrum of the giant planet XO-1b
• Comparing transit spectroscopy pipelines at the catalogue level: evidence for systematic differences
• Vanadium oxide clusters in substellar atmospheres: A quantum chemical study
• The strange case of Na I in the atmosphere of HD209458 b: Reconciling low- and high-resolution spectroscopic observations G
• The EXPLORE Project: A Deep Search for Transiting Extra-Solar Planets
• A transiting super-Earth close to the inner edge of the habitable zone of an M0 dwarf star
• The "Drake equation" of exomoons -- a cascade of formation, stability and detection
• A dayside thermal inversion in the atmosphere of WASP-19b
• PACMAN: A pipeline to reduce and analyze Hubble Wide Field Camera 3 IR Grism data
• Quantifying the Impact of Spectral Coverage on the Retrieval of Molecular Abundances from Exoplanet Transmission Spectra
• New Parameters and Transit Timing Studies for OGLE2-TR-L9 b
• Simulations of starspot anomalies within TESS exoplanetary transit light curves -- II
• How do wavelength correlations affect transmission spectra? Application of a new fast and flexible 2D Gaussian process framework to transiting exoplanet spectroscopy
• The Vegetation Red Edge Spectroscopic Feature as a Surface Biomarker
• The way forward
• The GAPS programme at TNG LXVI. A homogeneous search for Na i and its possible variability in ten gas giant exoplanets
• A Detailed Investigation of HD 209458 b HST & JWST Transmission Spectra with SANSAR
• Tighter constraints on the atmosphere of GJ 436 b from combined high-resolution CARMENES and CRIRES${}^{+}$ observations
• Osiris revisited: Confirming a solar metallicity and low C/O in HD 209458b
• A cautionary tale: limitations of a brightness-based spectroscopic approach to chromatic exoplanet radii
• Five new hot-Jupiter transits investigated with Swift-UVOT
• Utilizing a Database of Simulated Geometric Albedo Spectra for Photometric Characterization of Rocky Exoplanet Atmospheres
• Simultaneous multicolour transit photometry of hot Jupiters HAT-P-19b, HAT-P-51b, HAT-P-55b, and HAT-P-65b
• Doppler-Shifted Alkali D Absorption as Indirect Evidence for Exomoons
• Exoplanet Atmospheres and Giant Ground-Based Telescopes
• TOI-1199 b and TOI-1273 b: Two new transiting hot Saturns detected and characterized with SOPHIE and TESS
• Exoplanet atmospheres with EChO: spectral retrievals using EChOSim
• Reflected-light Phase Curves with PICASO: A Kepler-7b Case Study
• The ESPRESSO transmission spectrum of HD189733b : Extracting the planetary sodium and lithium signatures amid stellar contamination
• Galactic planetary science
• Helium escaping from the atmosphere of a nearby rocky exoplanet orbiting in a habitable zone
• A Comprehensive Analysis of the Panchromatic Transmission Spectrum of the Hot-Saturn WASP-96 b: Nondetection of Haze, Possible Sodium Limb Asymmetry, Stellar Characterization, and Formation History
• Infrared spectra of TiO2 clusters for hot Jupiter atmospheres
• A New Method for Calibration of Gain Variation in Detector System
• A Transmission Spectrum Of HD 189733b From Multiple Broadband Filter Observations
• Atmospheric composition and structure of HD209458b
• A New Transiting Extrasolar Giant Planet
• Retrieving the transmission spectrum of HD 209458b using CHOCOLATE: A new chromatic Doppler tomography technique
• Spectrophotometry with a transmission grating for detecting faint occultations
• A re-analysis of equilibrium chemistry in five hot Jupiters
• Illusion and Reality in the Atmospheres of Exoplanets
• Hot Exoplanet Atmospheres Resolved with Transit Spectroscopy (HEARTS) VIII. Nondetection of sodium in the atmosphere of the aligned planet KELT-10b
• Polycyclic Aromatic Hydrocarbons (PAHs) as an Extraterrestrial Atmospheric Technosignature
• Exploring the Diversity of Jupiter-Class Planets (Discussion Meeting Contribution)
• Stellar activity and transits
• Wobbling Ancient Binaries - Here Be Planets?
• Effect of Centrifugal Force on Transmission Spectroscopy of Exoplanet Atmospheres
• Atmospheric composition of WASP-85Ab with ESPRESSO/VLT observations
• Humid Evolution of Haze in the Atmosphere of Super-Earths in the Habitable Zone
• The Oxyometer: A Novel Instrument Concept for Characterizing Exoplanet Atmospheres
• From Global Climate Models (GCMs) to Exoplanet Spectra with the Global Emission Spectra (GlobES)
• Ground-Based Photometric Searches for Transiting Planets
• The Effects of Cuboid Particle Scattering on Reflected Light Phase Curves: Insights from Laboratory Data and Theory
• Unsupervised Method for Correlated Noise Removal for Multi-wavelength Exoplanet Transit Observations
• Transit detections of extrasolar planets around main-sequence stars - I. Sky maps for hot Jupiters
• Transmission spectroscopy of WASP-7 b with UVES -- Detection of Na I D${}_2$ and tentative D${}_1$ line absorption
• Diversity of Exoplanets
• Open Source High-Resolution Exoplanet Atmosphere Retrievals with POSEIDON
• Exoplanets: Possible Biosignatures
• A Global Perspective with Updated Constraints on the Ultra-hot Jupiter WASP-19b: Atmospheric Properties and Stellar Activity
• Molecular formation along the atmospheric mass loss of HD 209458 b and similar Hot Jupiters
• Reflected light from giant planets in habitable zones: Tapping into the power of the Cross-Correlation Function
• First on-sky results of a FIOS prototype, a Fabry Perot Based Instrument for Oxygen Searches
• Where does the simplified Stellar Contamination Model fail in Exoplanet Transmission Spectroscopy?
• The DRAKE mission: finding the frequency of life in the Cosmos
• Deciphering transmission spectra by exploring the solar paradigm
• Astronomy from the Moon: From Exoplanets to Cosmology in Visible Light and Beyond
• Extrasolar enigmas: from disintegrating exoplanets to exoasteroids
• Estimation of Exoplanetary Planet-to-Star Radius Ratio with Homomorphic Processing
• Detection of CO absorption in the atmosphere of the hot Jupiter HD 189733b
• Spectral types of planetary host star candidates from OGLE III
• Multi-color photometry and parameters estimation of Jupiter-sized exoplanets; TRES-3b, WASP-2b and HATP-30b
• Evolution and Observable Properties of Rocky Planet Atmospheres
• Effect of clouds on emission spectra for Super Venus
• Linking atmospheric chemistry of the hot Jupiter HD 209458b to its formation location through infrared transmission and emission spectra
• Searching for technosignatures in exoplanetary systems with current and future missions
• The Transits of Extrasolar Planets with Moons
• Exoplanets: past, present, and future
• Exploring the surface of HD 189733 via Doppler shadow analysis of planetary transits
• Low-resolution Transit Spectroscopy of Three Hot Jupiters Using the 2m Himalayan Chandra Telescope
• Klio: A 5 micron camera for the detection of giant exoplanets
• TOI-1518b: A Misaligned Ultra-hot Jupiter with Iron in its Atmosphere
• HAT-P-68b: A Transiting Hot Jupiter Around a K5 Dwarf Star
• Asymmetry and Variability in the Transmission Spectra of Tidally Locked Habitable Planets
• SPECtrophotometer for TRansmission spectroscopy of exoplanets (SPECTR)
• The search for exomoons and the characterization of exoplanet atmospheres
• All along the line of sight: a closer look at opening angles and absorption regions in the atmospheres of transiting exoplanets
• Discovering and Characterizing the Planetary Systems of Nearby Stars: The scientific need for medium aperture space coronagraph observations
• Chandra X-ray Observations of V830 Tau: A T Tauri Star Hosting an Evanescent Planet
• Analysing the flux stability of stellar calibrator candidates with TESS
• Near-Infrared Transit Photometry of Extra-Solar Planet HAT-P-54b
• Exposure-averaged Gaussian Processes for Combining Overlapping Datasets
• Radius Study of Ten Transiting Hot Jupiter Exoplanets with Ground-Based Observations