Article (Scientific journals)
Discovery of a brown dwarf companion to the star HIP 64892
Cheetham, A.; Bonnefoy, M.; Desidera, S. et al.
2018In Astronomy and Astrophysics, 615, p. 160
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Keywords :
brown dwarfs; stars: individual: HIP 64892; techniques: high angular resolution; planets and satellites: detection; planets and satellites: atmospheres; Astrophysics - Earth and Planetary Astrophysics; Astrophysics - Solar and Stellar Astrophysics
Abstract :
[en] We report the discovery of a bright, brown dwarf companion to the star HIP 64892, imaged with VLT/SPHERE during the SHINE exoplanet survey. The host is a B9.5V member of the Lower-Centaurus-Crux subgroup of the Scorpius Centaurus OB association. The measured angular separation of the companion (1.2705 ± 0.0023") corresponds to a projected distance of 159 ± 12 AU. We observed the target with the dual-band imaging and long- slit spectroscopy modes of the IRDIS imager to obtain its spectral energy distribution (SED) and astrometry. In addition, we reprocessed archival NACO L-band data, from which we also recover the companion. Its SED is consistent with a young (<30 Myr), low surface gravity object with a spectral type of M9[SUB]γ[/SUB] ± 1. From comparison with the BT- Settl atmospheric models we estimate an effective temperature of T[SUB]eff[/SUB] = 2600 ± 100 K, and comparison of the companion photometry to the COND evolutionary models yields a mass of 29-37 M[SUB]J[/SUB] at the estimated age of 16[SUB]-7[/SUB][SUP]+15[/SUP] Myr for the system. The star HIP 64892 is a rare example of an extreme-mass ratio system (q 0.01) and will be useful for testing models relating to the formation and evolution of such low-mass objects. <P />Based on observations collected at the European Organisation for Astronomical Research in the Southern Hemisphere under ESO programmes 096.C-0241 and 198.C-0209 (PI: J.-L. Beuzit), 098.A-9007(A) (PI: P. Sarkis), and 087.C-0790(A) (PI: M. Ireland).
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Cheetham, A.;  Département d'Astronomie, Université de Genève, 51 chemin des Maillettes, 1290, Versoix, Switzerland
Bonnefoy, M.;  Université Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Desidera, S.;  INAF - Osservatorio Astronomico di Padova, Vicolo dell' Osservatorio 5, 35122, Padova, Italy
Langlois, M.;  CRAL, UMR 5574, CNRS, Université de Lyon, Ecole Normale Supérieure de Lyon, 46 Allée d'Italie, 69364, Lyon Cedex 07, France ; Aix-Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille) UMR 7326, 13388, Marseille, France
Vigan, A.;  Aix-Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille) UMR 7326, 13388, Marseille, France
Schmidt, T.;  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
Olofsson, J.;  Max Planck Institute for Astronomy, Königstuhl 17, 69117, Heidelberg, Germany ; Unidad Mixta Internacional Franco-Chilena de Astronomía, CNRS/INSU UMI 3386 and Departamento de Astronomía, Universidad de Chile, Casilla 36-D, Santiago, Chile ; Núcleo Milenio Formación Planetaria - NPF, Universidad de Valparaíso, Av. Gran Bretaña 1111, Valparaíso, Chile
Chauvin, G.;  Université Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France ; Unidad Mixta Internacional Franco-Chilena de Astronomía, CNRS/INSU UMI 3386 and Departamento de Astronomía, Universidad de Chile, Casilla 36-D, Santiago, Chile
Klahr, H.;  Max Planck Institute for Astronomy, Königstuhl 17, 69117, Heidelberg, Germany
Gratton, R.;  INAF - Osservatorio Astronomico di Padova, Vicolo dell' Osservatorio 5, 35122, Padova, Italy
D'Orazi, V.;  INAF - Osservatorio Astronomico di Padova, Vicolo dell' Osservatorio 5, 35122, Padova, Italy
Henning, T.;  Max Planck Institute for Astronomy, Königstuhl 17, 69117, Heidelberg, Germany
Janson, M.;  Max Planck Institute for Astronomy, Königstuhl 17, 69117, Heidelberg, Germany ; Department of Astronomy, Stockholm University, AlbaNova University Center, 10691, Stockholm, Sweden
Biller, B.;  Max Planck Institute for Astronomy, Königstuhl 17, 69117, Heidelberg, Germany ; Institute for Astronomy, University of Edinburgh, Blackford Hill View, Edinburgh, EH9 3HJ, UK
Peretti, S.;  Département d'Astronomie, Université de Genève, 51 chemin des Maillettes, 1290, Versoix, Switzerland
Hagelberg, J.;  Département d'Astronomie, Université de Genève, 51 chemin des Maillettes, 1290, Versoix, Switzerland ; Université Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Ségransan, D.;  Département d'Astronomie, Université de Genève, 51 chemin des Maillettes, 1290, Versoix, Switzerland
Udry, S.;  Département d'Astronomie, Université de Genève, 51 chemin des Maillettes, 1290, Versoix, Switzerland
Mesa, D.;  INAF - Osservatorio Astronomico di Padova, Vicolo dell' Osservatorio 5, 35122, Padova, Italy ; INCT, Universidad De Atacama, C/ Copayapu 485, Copiapó, Atacama, Chile
Sissa, E.;  INAF - Osservatorio Astronomico di Padova, Vicolo dell' Osservatorio 5, 35122, Padova, Italy
Kral, Q.;  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 ; Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge, CB3 0HA, UK
Schlieder, J.;  Max Planck Institute for Astronomy, Königstuhl 17, 69117, Heidelberg, Germany ; Exoplanets and Stellar Astrophysics Laboratory, Code 667, NASA Goddard Space Flight Center, Greenbelt MD, USA
Maire, Anne-Lise ;  Max Planck Institute for Astronomy, Königstuhl 17, 69117, Heidelberg, Germany
Mordasini, C.;  Max Planck Institute for Astronomy, Königstuhl 17, 69117, Heidelberg, Germany ; Physikalisches Institut, University of Bern, Sidlerstrasse 5, 3012, Bern, Switzerland
Menard, F.;  Université Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Zurlo, A.;  Aix-Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille) UMR 7326, 13388, Marseille, France ; Núcleo de Astronomía, Facultad de Ingeniería y Ciencias, Universidad Diego Portales, Av. Ejercito 441, Santiago, Chile
Beuzit, J.-L.;  Université Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Feldt, M.;  Max Planck Institute for Astronomy, Königstuhl 17, 69117, Heidelberg, Germany
Mouillet, D.;  Université Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Meyer, M.;  Institute for Particle Physics and Astrophysics, ETH Zurich, Wolfgang-Pauli-Strasse 27, 8093, Zurich, Switzerland ; The University of Michigan, Ann Arbor, MI, 48109, USA
Lagrange, A.-M.;  Université 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
Keppler, M.;  Max Planck Institute for Astronomy, Königstuhl 17, 69117, Heidelberg, Germany
Kopytova, T.;  Max Planck Institute for Astronomy, Königstuhl 17, 69117, Heidelberg, Germany ; School of Earth & Space Exploration, Arizona State University, Tempe, AZ, 85287, USA ; Ural Federal University, Yekaterinburg, 620002, Russia
Ligi, R.;  Aix-Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille) UMR 7326, 13388, Marseille, France
Rouan, D.;  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
Le Coroller, H.;  Aix-Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille) UMR 7326, 13388, Marseille, France
Dominik, C.;  Anton Pannekoek Institute for Astronomy, Science Park 904, 1098, XH Amsterdam, The Netherlands
Lagadec, E.;  Université Cote d'Azur, OCA, CNRS, Lagrange, France
Turatto, M.;  INAF - Osservatorio Astronomico di Padova, Vicolo dell' Osservatorio 5, 35122, Padova, Italy
Abe, L.;  Université Cote d'Azur, OCA, CNRS, Lagrange, France
Antichi, J.;  INAF - Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, 50125, Firenze, Italy
Baruffolo, A.;  INAF - Osservatorio Astronomico di Padova, Vicolo dell' Osservatorio 5, 35122, Padova, Italy
Baudoz, P.;  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
Blanchard, P.;  Aix-Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille) UMR 7326, 13388, Marseille, France
Buey, T.;  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
Carbillet, M.;  Université Cote d'Azur, OCA, CNRS, Lagrange, France
Carle, M.;  Aix-Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille) UMR 7326, 13388, Marseille, France
Cascone, E.;  INAF - Osservatorio Astronomico di Capodimonte, Salita Moiariello 16, 80131, Napoli, Italy
Claudi, R.;  INAF - Osservatorio Astronomico di Padova, Vicolo dell' Osservatorio 5, 35122, Padova, Italy
Costille, A.;  Aix-Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille) UMR 7326, 13388, Marseille, France
Delboulbé, A.;  Université Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
De Caprio, V.;  INAF - Osservatorio Astronomico di Capodimonte, Salita Moiariello 16, 80131, Napoli, Italy
Dohlen, K.;  Aix-Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille) UMR 7326, 13388, Marseille, France
Fantinel, D.;  INAF - Osservatorio Astronomico di Padova, Vicolo dell' Osservatorio 5, 35122, Padova, Italy
Feautrier, P.;  Université Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Fusco, T.;  ONERA (Office National d'Etudes et de Recherches Aérospatiales), BP 72, 92322, Chatillon, France
Giro, E.;  INAF - Osservatorio Astronomico di Padova, Vicolo dell' Osservatorio 5, 35122, Padova, Italy
Gluck, L.;  Université Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Hubin, N.;  European Southern Observatory (ESO), Karl-Schwarzschild-Str. 2, 85748, Garching, Germany
Hugot, E.;  Aix-Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille) UMR 7326, 13388, Marseille, France
Jaquet, M.;  Aix-Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille) UMR 7326, 13388, Marseille, France
Kasper, M.;  European Southern Observatory (ESO), Karl-Schwarzschild-Str. 2, 85748, Garching, Germany
Llored, M.;  Aix-Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille) UMR 7326, 13388, Marseille, France
Madec, F.;  Aix-Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille) UMR 7326, 13388, Marseille, France
Magnard, Y.;  Université Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Martinez, P.;  Université Cote d'Azur, OCA, CNRS, Lagrange, France
Maurel, D.;  Université Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Le Mignant, D.;  Aix-Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille) UMR 7326, 13388, Marseille, France
Möller-Nilsson, O.;  Max Planck Institute for Astronomy, Königstuhl 17, 69117, Heidelberg, Germany
Moulin, T.;  Université Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Origné, A.;  Aix-Marseille Université, CNRS, LAM (Laboratoire d'Astrophysique de Marseille) UMR 7326, 13388, Marseille, France
Pavlov, A.;  Max Planck Institute for Astronomy, Königstuhl 17, 69117, Heidelberg, Germany
Perret, D.;  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
Petit, C.;  ONERA (Office National d'Etudes et de Recherches Aérospatiales), BP 72, 92322, Chatillon, France
Pragt, J.;  NOVA Optical Infrared Instrumentation Group, Oude Hoogeveensedijk 4, 7991, PD Dwingeloo, The Netherlands
Puget, P.;  Université Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Rabou, P.;  Université Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Ramos, J.;  Max Planck Institute for Astronomy, Königstuhl 17, 69117, Heidelberg, Germany
Rigal, F.;  Anton Pannekoek Institute for Astronomy, Science Park 904, 1098, XH Amsterdam, The Netherlands
Rochat, S.;  Université Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Roelfsema, R.;  NOVA Optical Infrared Instrumentation Group, Oude Hoogeveensedijk 4, 7991, PD Dwingeloo, The Netherlands
Rousset, G.;  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
Roux, A.;  Université Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Salasnich, B.;  INAF - Osservatorio Astronomico di Padova, Vicolo dell' Osservatorio 5, 35122, Padova, Italy
Sauvage, J.-F.;  ONERA (Office National d'Etudes et de Recherches Aérospatiales), BP 72, 92322, Chatillon, France
Sevin, 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
Soenke, C.;  European Southern Observatory (ESO), Karl-Schwarzschild-Str. 2, 85748, Garching, Germany
Stadler, E.;  Université Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Suarez, M.;  European Southern Observatory (ESO), Alonso de Córdova 3107, Vitacura, Casilla, 19001, Santiago, Chile
Weber, L.;  Département d'Astronomie, Université de Genève, 51 chemin des Maillettes, 1290, Versoix, Switzerland
Wildi, F.;  Département d'Astronomie, Université de Genève, 51 chemin des Maillettes, 1290, Versoix, Switzerland)
More authors (82 more) Less
Language :
English
Title :
Discovery of a brown dwarf companion to the star HIP 64892
Publication date :
01 August 2018
Journal title :
Astronomy and Astrophysics
ISSN :
0004-6361
eISSN :
1432-0746
Publisher :
EDP Sciences, Les Ulis, France
Volume :
615
Pages :
A160
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 21 January 2020

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