A resolved debris disk around the candidate planet-hosting star HD95086

Abstract

Recently, a new planet candidate was discovered on direct images around the young (10-17 Myr) A-type star HD95086. The strong infrared excess of the system indicates that, similarly to HR8799, ß Pic, and Fomalhaut, the star harbors a circumstellar disk. Aiming to study the structure and gas content of the HD95086 disk, and to investigate its possible interaction with the newly discovered planet, here we present new optical, infrared and millimeter observations. We detected no CO emission, excluding the possibility of an evolved gaseous primordial disk. Simple blackbody modeling of the spectral energy distribution suggests the presence of two spatially separate dust belts at radial distances of 6 and 64 AU. Our resolved images obtained with the Herschel Space Observatory reveal a characteristic disk size of ~6.0x5.4 arcsec (540x490 AU) and disk inclination of ~25 degree. Assuming the same inclination for the planet candidate's orbit, its re-projected radial distance from the star is 62 AU, very close to the blackbody radius of the outer cold dust ring. The structure of the planetary system at HD95086 resembles the one around HR8799. Both systems harbor a warm inner dust belt and a broad colder outer disk and giant planet(s) between the two dusty regions. Modelling implies that the candidate planet can dynamically excite the motion of planetesimals even out to 270 AU via their secular perturbation if its orbital eccentricity is larger than about 0.4. Our analysis adds a new example to the three known systems where directly imaged planet(s) and debris disks co-exist.

Accepted for publication in ApJ Letters, 6 pages, 2 figures, 3 tables (emulateapj style)

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Cited by in corpus (34)

• The Gemini Planet Imager Exoplanet Survey: Giant Planet and Brown Dwarf Demographics From 10-100 AU
• HD 106906 b: A planetary-mass companion outside a massive debris disk
• Confirmation of the planet around HD 95086 by direct imaging
• Do Two Temperature Debris Disks Have Multiple Belts?
• The dust grain size - stellar luminosity trend in debris discs
• Spectroscopic characterization of HD 95086 b with the Gemini Planet Imager
• Planetary chaotic zone clearing: destinations and timescales
• The Correlation Between Metallicity and Debris Disk mass
• A Direct Imaging Survey of Spitzer detected debris disks: Occurrence of giant planets in dusty systems
• Stirring in massive, young debris discs from spatially resolved Herschel images
• Debris Distribution in HD 95086 - A Young Analog of HR 8799
• On the Morphology and Chemical Composition of the HR 4796A Debris Disk
• Self-Stirring of Debris Discs by Planetesimals Formed by Pebble Concentration
• Host star metallicity of directly imaged wide-orbit planets: implications for planet formation
• Hint of curvature in the orbital motion of the exoplanet 51 Eridani b using 3 years of VLT/SPHERE monitoring
• ALMA 1.3 Millimeter Map of the HD 95086 System
• A $75\%$ Occurrence Rate of Debris Discs around F stars in the $\beta$ Pic Moving Group
• Constraints on the architecture of the HD 95086 planetary system with the Gemini Planet Imager
• Orbital Stability of Multi-Planet Systems: Behavior at High Masses
• TESS Hunt for Young and Maturing Exoplanets (THYME) IX: a 27 Myr extended population of Lower-Centaurus Crux with a transiting two-planet system
• A HARPS RV search for planets around young nearby stars
• Pursuing the planet-debris disk connection: Analysis of upper limits from the Anglo-Australian Planet Search
• The Age of the Carina Young Association and Potential Membership of HD 95086
• Searching for Planets in Holey Debris Disks with the Apodizing Phase Plate
• Primordial or Secondary? Testing models of debris disk gas with ALMA
• Chemical analysis of early-type stars with planets
• On the cavity of a debris disc carved by a giant planet
• Deep ALMA Search for CO Gas in the HD 95086 Debris Disc
• Dust Spreading in Debris Discs: Do Small Grains Cling on to Their Birth Environment?
• In-depth direct imaging and spectroscopic characterization of the young Solar System analog HD 95086
• High resolution ALMA observation of the ${}^{12}$CO(3-2) and 350 GHz continuum emissions of the debris disc of 49 Ceti
• Enrichment of the HR 8799 planets by minor bodies and dust
• Debris Disks in Nearby Young Moving Groups in the ALMA Era
• Resolving the large exoKuiper belt of the HD 126062 debris disc and extended gas emission in its vicinity