Insights into the planetary dynamics of HD 206893 with ALMA

Abstract

Radial substructure in the form of rings and gaps has been shown to be ubiquitous among protoplanetary discs. This could be the case in exoKuiper belts as well, and evidence for this is emerging. In this paper we present ALMA observations of the debris/planetesimal disc surrounding HD 206893, a system that also hosts two massive companions at 2 and 11 au. Our observations reveal a disc extending from 30 to 180 au, split by a 27 au wide gap centred at 74 au, and no dust surrounding the reddened brown dwarf (BD) at 11 au. The gap width suggests the presence of a 0.9 M${}_{\mathrm{Jup}}$ planet at 74 au, which would be the third companion in this system. Using previous astrometry of the BD, combined with our derived disc orientation as a prior, we were able to better constrain its orbit finding it is likely eccentric ($0.14_{-0.04}^{+0.05}$). For the innermost companion, we used RV, proper motion anomaly and stability considerations to show its mass and semi-major axis are likely in the range 4-100 M${}_{\mathrm{Jup}}$ and 1.4-4.5 au. These three companions will interact on secular timescales and perturb the orbits of planetesimals, stirring the disc and potentially truncating it to its current extent via secular resonances. Finally, the presence of a gap in this system adds to the growing evidence that gaps could be common in wide exoKuiper belts. Out of 6 wide debris discs observed with ALMA with enough resolution, 4-5 show radial substructure in the form of gaps.

References in corpus (120)

• Gaia Data Release 2. Summary of the contents and survey properties
• Validation of the new Hipparcos reduction
• Evolutionary models for cool brown dwarfs and extrasolar giant planets. The case of HD 20945
• The Disk Substructures at High Angular Resolution Project (DSHARP): I. Motivation, Sample, Calibration, and Overview
• REBOUND: An open-source multi-purpose N-body code for collisional dynamics
• Images of a fourth planet orbiting HR 8799
• Optical Images of an Exosolar Planet 25 Light Years from Earth
• The photodissociation and chemistry of CO isotopologues: applications to interstellar clouds and circumstellar disks
• Gaps and Rings in an ALMA Survey of Disks in the Taurus Star-forming Region
• The Disk Substructures at High Angular Resolution Project (DSHARP): II. Characteristics of Annular Substructures
• A planetary system as the origin of structure in Fomalhaut's dust belt
• Stellar and substellar companions of nearby stars from Gaia DR2 - Binarity from proper motion anomaly
• Gaps, Rings, and Non-Axisymmetric Structures in Protoplanetary Disks - From Simulations to ALMA Observations
• Transience of hot dust around sun-like stars
• A planet on an inclined orbit as an explanation of the warp in the Beta Pictoris disk
• Debris Disks: Structure, Composition, and Variability
• Dynamic temperature selection for parallel-tempering in Markov chain Monte Carlo simulations
• Collisional Processes in Extrasolar Planetsimal Disks - Dust Clumps in Fomalhaut's Debris Disk
• Compact Disks in a High Resolution ALMA Survey of Dust Structures in the Taurus Molecular Cloud
• The SCUBA-2 Cosmology Legacy Survey: ALMA resolves the rest-frame far-infrared emission of sub-millimeter galaxies
• Variations on Debris Disks: Icy Planet Formation at 30-150 AU for 1-3 Solar Mass Main Sequence Stars
• Molecular Gas Clumps from the Destruction of Icy Bodies in the $\beta$ Pictoris Debris Disk
• Probing for Exoplanets Hiding in Dusty Debris Disks: Disk Imaging, Characterization, and Exploration with HST/STIS Multi-Roll Coronagraphy
• Fomalhaut's Debris Disk and Planet: Constraining the Mass of Fomalhaut b From Disk Morphology
• Nearby debris disk systems with high fractional luminosity reconsidered
• First light of the VLT planet finder SPHERE. III. New spectrophotometry and astrometry of the HR8799 exoplanetary system
• Two-Component Secular Gravitational Instability in a Protoplanetary Disk: A Possible Mechanism for Creating Ring-Like Structures
• A 40 Myr Old Gaseous Circumstellar Disk at 49 Ceti: Massive CO-Rich Comet Clouds at Young A-Type Stars
• Debris disc stirring by secular perturbations from giant planets
• Predictions for a planet just inside Fomalhaut's eccentric ring
• Exocometary gas in the HD 181327 debris ring
• orbitize!: A Comprehensive Orbit-fitting Software Package for the High-contrast Imaging Community
• Predictions for the secondary CO, C and O gas content of debris discs from the destruction of volatile-rich planetesimals
• Hybrid Symplectic Integrators for Planetary Dynamics
• 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
• Constraining the Planetary System of Fomalhaut Using High-Resolution ALMA Observations
• Formation of sharp eccentric rings in debris disks with gas but without planets
• Detection of exocometary CO within the 440 Myr-old Fomalhaut belt: a similar CO+CO${}_2$ ice abundance in exocomets and Solar System comets
• MIRACLES: atmospheric characterization of directly imaged planets and substellar companions at 4-5 $\mu$m. I. Photometric analysis of $\beta$ Pic b, HIP 65426 b, PZ Tel B and HD 206893 B
• Can dead zones create structures like a transition disk?
• Herschel imaging of 61 Vir: implications for the prevalence of debris in low-mass planetary systems
• Herschel images of Fomalhaut. An extrasolar Kuiper Belt at the height of its dynamical activity
• The History of the Solar System's Debris Disc: Observable Properties of the Kuiper Belt
• Molecular gas in debris disks around young A-type stars
• Demonstrating A New Census of INfrared Galaxies with ALMA (DANCING-ALMA). I. FIR Size and Luminosity Relation at z = 0-6 Revealed with 1034 ALMA Sources
• beta Pic b position relative to the Debris Disk
• A Complete ALMA Map of the Fomalhaut Debris Disk
• Dust unveils the formation of a mini-Neptune planet in a protoplanetary ring
• ALMA observations of the $\eta$ Corvi debris disc: inward scattering of CO-rich exocomets by a chain of 3-30 M${}_{\oplus }$ planets?
• Kuiper Belt-Like Hot and Cold Populations of Planetesimal Inclinations in the $\beta$ Pictoris Belt Revealed by ALMA
• Discovery of a low-mass companion inside the debris ring surrounding the F5V star HD206893
• Dynamical evolution of an eccentric planet and a less massive debris disc
• Frankenstein: Protoplanetary disc brightness profile reconstruction at sub-beam resolution with a rapid Gaussian process
• Are debris disks self-stirred?
• Does the presence of planets affect the frequency and properties of extrasolar Kuiper Belts? Results from the Herschel DEBRIS and DUNES surveys
• A gap in the planetesimal disc around HD 107146 and asymmetric warm dust emission revealed by ALMA
• CO mass upper limits in the Fomalhaut ring - the importance of NLTE excitation in debris discs and future prospects with ALMA
• Sub-millimeter images of a dusty Kuiper belt around eta Corvi
• An Empirical Planetesimal Belt Radius - Stellar Luminosity Relation
• Resolving the Planetesimal Belt of HR 8799 with ALMA
• Collisional Evolution of Irregular Satellite Swarms: Detectable Dust around Solar System and Extrasolar Planets
• Are Debris Disks and Massive Planets Correlated?
• Planetary chaotic zone clearing: destinations and timescales
• Variations on Debris Disks II. Icy Planet Formation as a Function of the Bulk Properties and Initial Sizes of Planetesimals
• Dust-driven viscous ring-instability in protoplanetary disks
• Discovery of a Substellar Companion to the Nearby Debris Disk Host HR 2562
• A Direct Imaging Survey of Spitzer detected debris disks: Occurrence of giant planets in dusty systems
• SPHERE/SHINE reveals concentric rings in the debris disk of HIP 73145
• Locating the planetesimals belts in the multiple-planet systems HD 128311, HD 202206, HD 82943 and HR 8799
• In-depth study of moderately young but extremely red, very dusty substellar companion HD206893B
• ALMA observations of the debris disk around the young Solar Analog HD 107146
• An independent determination of Fomalhaut b's orbit and the dynamical effects on the outer dust belt
• Constraints on Planetesimal Collision Models in Debris Disks
• Correlations between the stellar, planetary and debris components of exoplanet systems observed by $\text{Herschel}$
• Hubble and Spitzer Space Telescope Observations of the Debris Disk around the Nearby K Dwarf HD 92945
• The Mass of Stirring Bodies in the AU Mic Debris Disk Inferred from Resolved Vertical Structure
• Discovery of concentric broken rings at sub-arcsec separations in the HD 141569A gas-rich, debris disk with VLT/SPHERE
• A gap in HD 92945's broad planetesimal disc revealed by ALMA
• Post conjunction detection of $\beta$ Pictoris b with VLT/SPHERE
• Apocenter glow in eccentric debris disks: implications for Fomalhaut and epsilon Eridani
• Imaging [CI] around HD 131835: reinterpreting young debris discs with protoplanetary disc levels of CO gas as shielded secondary discs
• Collisional evolution of eccentric planetesimal swarms
• Cometary impactors on the TRAPPIST-1 planets can destroy all planetary atmospheres and rebuild secondary atmospheres on planets f, g, h
• Population synthesis of exocometary gas around A stars
• Toroidal vortices and the conglomeration of dust into rings in protoplanetary discs
• New HST data and modeling reveal a massive planetesimal collision around Fomalhaut
• A statistically significant lack of debris discs in medium separation binary systems
• Self-Stirring of Debris Discs by Planetesimals Formed by Pebble Concentration
• Near-infrared emission from sublimating dust in collisionally active debris disks
• Susceptibility of planetary atmospheres to mass loss and growth by planetesimal impacts: the impact shoreline
• Double-ringed debris discs could be the work of eccentric planets: explaining the strange morphology of HD 107146
• Dust Distribution in Gas Disks II: Self Induced Ring Formation Through a Clumping Instability
• Belt(s) of debris resolved around the Sco-Cen star HIP 67497
• Molecular reconnaissance of the $\beta$ Pictoris gas disk with the SMA: a low HCN/(CO+CO${}_2$) outgassing ratio and predictions for future surveys
• From scattered-light to millimeter emission: A comprehensive view of the Gyr-old system of HD 202628 and its eccentric debris ring
• The Scattered Disc of HR 8799
• Multiple Rings of Millimeter Dust Emission in the HD 15115 Debris Disk
• ALMA 1.3 Millimeter Map of the HD 95086 System
• Kuiper belt structure around nearby super-Earth host stars
• ISPY -- NACO Imaging Survey for Planets around Young stars: Survey description and results from the first 2.5 years of observations
• Constraints on the architecture of the HD 95086 planetary system with the Gemini Planet Imager
• Exo-zodi modelling for the Large Binocular Telescope Interferometer
• Resolved Millimeter Observations of the HR 8799 Debris Disk
• Scattering of exocomets by a planet chain: exozodi levels and the delivery of cometary material to inner planets
• ALMA observations of the multiplanet system 61 Vir: What lies outside super-Earth systems?
• Investigating the presence of two belts in the HD 15115 system
• Upper limits on protolunar disc masses using ALMA observations of directly-imaged exoplanets
• No significant correlation between radial velocity planet presence and debris disc properties
• Empty gaps? Depleting annular regions in debris discs by secular resonance with a two-planet system
• Capture and evolution of dust in planetary mean-motion resonances: a fast, semi-analytic method for generating resonantly trapped disk images
• The interplay between radiation pressure and the photoelectric instability in optically thin disks of gas and dust
• Dynamical models to explain observations with SPHERE in planetary systems with double debris belts
• Estimating sizes of faint, distant galaxies in the submillimetre regime
• Insights on the dynamical history of the Fomalhaut system - Investigating the Fom c hypothesis
• On the cavity of a debris disc carved by a giant planet
• Using warm dust to constrain unseen planets
• Shaping HR8799's outer dust belt with an unseen planet
• Two cold belts in the debris disk around the G-type star NZ Lup
• ISPY -- NaCo Imaging Survey for Planets around Young stars. Discovery of an M dwarf in the gap between HD 193571 and its debris ring

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• The Ophiuchus DIsc Survey Employing ALMA (ODISEA)-III: the evolution of substructures in massive discs at 3-5 au resolution
• Direct discovery of the inner exoplanet in the HD206893 system. Evidence for deuterium burning in a planetary-mass companion
• Rotation Periods, Inclinations, and Obliquities of Cool Stars Hosting Directly Imaged Substellar Companions: Spin-Orbit Misalignments are Common
• A detailed characterization of HR 8799's debris disk with ALMA in Band 7
• Formation of Gaps in Self-Gravitating Debris Disks by Secular Resonance in a Single-planet System I: A Simplified Model
• From Pebbles and Planetesimals to Planets and Dust: the Protoplanetary Disk--Debris Disk Connection
• Constraining planetesimal stirring: how sharp are debris disc edges?
• Deprojecting and constraining the vertical thickness of exoKuiper belts
• ALMA Observations of the HD~110058 debris disk
• GRAVITY K-band spectroscopy of HD 206893 B: brown dwarf or exoplanet
• Resolving Structure in the Debris Disk around HD 206893 with ALMA
• The formation of wide exoKuiper belts from migrating dust traps
• Gap carving by a migrating planet embedded in a massive debris disc
• Rave: A non-parametric method for recovering the surface brightness and height profiles of edge-on debris disks
• The ALMA survey to Resolve exoKuiper belt Substructures (ARKS) II. The radial structure of debris discs
• The ALMA survey to Resolve exoKuiper belt Substructures (ARKS) I: Motivation, sample, data reduction, and results overview
• Inner edges of planetesimal belts: collisionally eroded or truncated?
• Self-gravity of debris discs can strongly change the outcomes of interactions with inclined planets
• Flybys in debris disk systems with Gaia eDR3
• The ALMA survey to Resolve exoKuiper belt Substructures (ARKS) V: Comparison between scattered light and thermal emission
• Limits on the presence of planets in systems with debris disks: HD 92945 and HD 107146
• Exomoon search with VLTI/GRAVITY around the substellar companion HD 206893 B
• Debris discs in binaries: morphology and photometric signatures
• The first scattered light images of HD 112810, a faint debris disk in the Sco-Cen association
• Evolution of Planetary Chaotic Zones in Planetesimal Disks
• Discovery of carbon monoxide emission from five debris disks around young A-type stars
• Debris Disks
• New constraints on the presence of debris disks around G 196-3 B and VHS J125601.92-125723.9 b
• Twisted extreme trans-Neptunian orbital parameter space: statistically significant asymmetries confirmed
• Resolving the large exoKuiper belt of the HD 126062 debris disc and extended gas emission in its vicinity