Article (Scientific journals)
Discovery of a low-mass companion inside the debris ring surrounding the F5V star HD 206893
Milli, J.; Hibon, P.; Christiaens, Valentin et al.
2017In Astronomy and Astrophysics, 597, p. 2
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Keywords :
brown dwarfs; circumstellar matter; planet-disk interactions; planetary systems
Abstract :
[en] <BR /> Aims: Uncovering the ingredients and the architecture of planetary systems is a very active field of research that has fuelled many new theories on giant planet formation, migration, composition, and interaction with the circumstellar environment. We aim at discovering and studying new such systems, to further expand our knowledge of how low-mass companions form and evolve. <BR /> Methods: We obtained high-contrast H-band images of the circumstellar environment of the F5V star HD 206893, known to host a debris disc never detected in scattered light. These observations are part of the SPHERE High Angular Resolution Debris Disc Survey (SHARDDS) using the InfraRed Dual-band Imager and Spectrograph (IRDIS) installed on VLT/SPHERE. <BR /> Results: We report the detection of a source with a contrast of 3.6 × 10[SUP]-5[/SUP] in the H-band, orbiting at a projected separation of 270 milliarcsec or 10 au, corresponding to a mass in the range 24 to 73 M[SUB]Jup[/SUB] for an age of the system in the range 0.2 to 2 Gyr. The detection was confirmed ten months later with VLT/NaCo, ruling out a background object with no proper motion. A faint extended emission compatible with the disc scattered light signal is also observed. <BR /> Conclusions: The detection of a low-mass companion inside a massive debris disc makes this system an analog of other young planetary systems such as β Pictoris, HR 8799 or HD 95086 and requires now further characterisation of both components to understand their interactions.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Milli, J.;  European Southern Observatory (ESO), Alonso de Córdova 3107, Vitacura, Santiago, Chile
Hibon, P.;  European Southern Observatory (ESO), Alonso de Córdova 3107, Vitacura, Santiago, Chile
Christiaens, Valentin  ;  Université de Liège - ULiège > Form. doct. sc. (sc. spatiales - paysage)
Choquet, É.;  Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA, 91109, USA
Bonnefoy, M.;  Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Kennedy, G. M.;  Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge, UK
Wyatt, M. C.;  Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge, UK
Absil, Olivier  ;  Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Gómez González, Carlos ;  Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
del Burgo, C.;  Instituto Nacional de Astrofísica, Óptica y Electrónica, Luis Enrique Erro 1, Sta. Ma. Tonantzintla, Puebla, Mexico
Matrà, L.;  Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge, UK
Augereau, J.-C.;  Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Boccaletti, A.;  LESIA, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC Univ. Paris 06, Univ. Paris Diderot, Sorbonne Paris Cité, 5 place Jules Janssen, 92195, Meudon, France
Delacroix, Christian  ;  Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Ertel, S.;  Steward Observatory, University of Arizona, 933 N Cherry Ave, Tucson, AZ, 85719, USA
Dent, W. R. F.;  Atacama Large Millimeter/submillimeter Array (ALMA) Santiago Central Offices, Alonso de Córdova 3107, Vitacura, Casilla 763 0355, Santiago, Chile
Forsberg, P.;  Department of Engineering Sciences, Ångström Laboratory, Uppsala University, PO Box 534, 751 21, Uppsala, Sweden
Fusco, T.;  ONERA, The French Aerospace Lab, BP72, 29 avenue de la Division Leclerc, 92322, Chatillon Cedex, France
Girard, J. H.;  European Southern Observatory (ESO), Alonso de Córdova 3107, Vitacura, Santiago, Chile
Habraken, Serge ;  Université de Liège > Département de physique > Optique - Hololab
Huby, Elsa ;  Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Karlsson, M.;  Department of Engineering Sciences, Ångström Laboratory, Uppsala University, PO Box 534, 751 21, Uppsala, Sweden
Lagrange, A.-M.;  Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Mawet, D.;  Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA, 91109, USA ; Department of Astronomy, California Institute of Technology, 1200 E. California Blvd, MC 249-17, Pasadena, CA, 91125, USA
Mouillet, D.;  Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Perrin, M.;  Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD, 21218, USA
Pinte, C.;  Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Pueyo, L.;  Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD, 21218, USA
Reyes, C.;  European Southern Observatory (ESO), Alonso de Córdova 3107, Vitacura, Santiago, Chile
Soummer, R.;  Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD, 21218, USA
Surdej, Jean  ;  Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Tarricq, Y.;  European Southern Observatory (ESO), Alonso de Córdova 3107, Vitacura, Santiago, Chile
Wahhaj, Z.;  European Southern Observatory (ESO), Alonso de Córdova 3107, Vitacura, Santiago, Chile)
More authors (23 more) Less
Language :
English
Title :
Discovery of a low-mass companion inside the debris ring surrounding the F5V star HD 206893
Publication date :
01 January 2017
Journal title :
Astronomy and Astrophysics
ISSN :
0004-6361
eISSN :
1432-0746
Publisher :
EDP Sciences, Les Ulis, France
Volume :
597
Pages :
L2
Peer reviewed :
Peer Reviewed verified by ORBi
European Projects :
FP7 - 337569 - VORTEX - Taking extrasolar planet imaging to a new level with vector vortex coronagraphy
Name of the research project :
VORTEX
Funders :
CE - Commission Européenne [BE]
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