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A Resolved Debris Disk Around the Candidate Planet-hosting Star HD 95086Recently, a new planet candidate was discovered on direct images around the young (10-17 Myr) A-type star HD 95086. The strong infrared excess of the system indicates that, similar to HR8799, Beta Pic, and Fomalhaut, the star harbors a circumstellar disk. Aiming to study the structure and gas content of the HD 95086 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 approx. 6.0 × 5.4 (540 × 490 AU) and disk inclination of approx 25 deg. Assuming the same inclination for the planet candidate's orbit, its reprojected 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 HD 95086 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. Modeling 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 coexist.
Document ID
20140013344
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
External Source(s)
doi:10.1088/2041-8205/775/2/L51
Authors
Moor, A. (Konkoly Observatory Budapest, Hungary)
Abraham, P. (Konkoly Observatory Budapest, Hungary)
Kospal, A. (European Space Agency. European Space Research and Technology Center, ESTEC Noordwijk, Netherlands)
Szabo, Gy. M. (Konkoly Observatory Budapest, Hungary)
Apai, D. (Arizona Univ. Tucson, AZ, United States)
Balog, Z. (Max-Planck-Inst. fuer Astronomie Heidelberg, Germany)
Csengeri, T. (Max-Planck-Inst. fuer Radioastronomie Bonn, Germany)
Grady, C. (Eureka Scientific, Inc. Oakland, CA, United States)
Henning, Th. (Max-Planck-Inst. fuer Astronomie Heidelberg, Germany)
Juhasz, J. (Leiden Univ. Netherlands)
Kiss, Cs. (Konkoly Observatory Budapest, Hungary)
Pasucci, I. (Arizona Univ. Tucson, AZ, United States)
Szulagyi, J. (Observatoire de la Cote d'Azur Nice, France)
Vavrek, R. (European Space Astronomy Center (ESAC) Madrid, Spain)
Date Acquired
November 5, 2014
Publication Date
September 19, 2013
Publication Information
Publication: The Astrophysical Journal Letters
Publisher: American Astronomical Society
Volume: 51
Issue: 2
Subject Category
Astronomy
Report/Patent Number
GSFC-E-DAA-TN12417
Funding Number(s)
CONTRACT_GRANT: NNG12PP44P
CONTRACT_GRANT: Hungarian OTKA K101393
CONTRACT_GRANT: Hungarian OTKA K104607
CONTRACT_GRANT: ESA PECS98073
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
gas content
blackbody radius
A-type star HD 95086

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