Article (Scientific journals)
Orbiting a binary. SPHERE characterisation of the HD 284149 system
Bonavita, M.; D'Orazi, V.; Mesa, D. et al.
2017In Astronomy and Astrophysics, 608, p. 106
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Keywords :
stars: individual: HD 284149; brown dwarfs; binaries: visual; stars: rotation; techniques: high angular resolution; Astrophysics - Earth and Planetary Astrophysics
Abstract :
[en] <BR /> Aims: In this paper we present the results of the SPHERE observation of the <ASTROBJ>HD 284149</ASTROBJ> system, aimed at a more detailed characterisation of both the primary and its brown dwarf companion. <BR /> Methods: We observed <ASTROBJ>HD 284149</ASTROBJ> in the near-infrared with SPHERE, using the imaging mode (IRDIS+IFS) and the long-slit spectroscopy mode (IRDIS-LSS). The data were reduced using the dedicated SPHERE pipeline, and algorithms such as PCA and TLOCI were applied to reduce the speckle pattern. <BR /> Results: The IFS images revealed a previously unknown low-mass ( 0.16 M[SUB]☉[/SUB]) stellar companion (<ASTROBJ>HD 294149</ASTROBJ> B) at 0.1'', compatible with previously observed radial velocity differences, as well as proper motion differences between Gaia and Tycho-2 measurements. The known brown dwarf companion (<ASTROBJ>HD 284149</ASTROBJ> b) is clearly visible in the IRDIS images. This allowed us to refine both its photometry and astrometry. The analysis of the medium resolution IRDIS long slit spectra also allowed a refinement of temperature and spectral type estimates. A full reassessment of the age and distance of the system was also performed, leading to more precise values of both mass and semi-major axis. <BR /> Conclusions: As a result of this study, <ASTROBJ>HD 284149</ASTROBJ> ABb therefore becomes the latest addition to the (short) list of brown dwarfs on wide circumbinary orbits, providing new evidence to support recent claims that object in such configuration occur with a similar frequency to wide companions to single stars. <P />The reduced spectrum is only available at the CDS via anonymous ftp to <A href="http://cdsarc.u-strasbg.fr">http://cdsarc.u-strasbg.fr</A> (<A href="http://130.79.128.5">http://130.79.128.5</A>) or via <A href="http://cdsarc.u-strasbg.fr/viz- bin/qcat?J/A+A/608/A106">http://cdsarc.u-strasbg.fr/viz- bin/qcat?J/A+A/608/A106</A>
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Bonavita, M.;  INAF-Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122, Padova, Italy ; Institute for Astronomy, The University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh, EH9 3HJ, UK
D'Orazi, V.;  INAF-Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122, Padova, Italy
Mesa, D.;  INAF-Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122, Padova, Italy
Fontanive, C.;  Institute for Astronomy, The University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh, EH9 3HJ, UK
Desidera, S.;  INAF-Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122, Padova, Italy
Messina, S.;  INAF-Osservatorio Astronomico di Catania, via Santa Sofia, 78, Catania, Italy
Daemgen, S.;  Institute for Astronomy, ETH Zurich, Wolfgang-Pauli Strasse 27, 8093, Zurich, Switzerland
Gratton, R.;  INAF-Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122, Padova, Italy
Vigan, A.;  Aix Marseille Univ., CNRS, LAM, Laboratoire d'Astrophysique de Marseille, 13013, Marseille, France
Bonnefoy, M.;  Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Zurlo, A.;  Aix Marseille Univ., CNRS, LAM, Laboratoire d'Astrophysique de Marseille, 13013, Marseille, France ; Núcleo de Astronomía, Facultad de Ingeniería, Universidad Diego Portales, Av. Ejercito 441, Santiago, Chile
Antichi, J.;  INAF-Osservatorio Astrofisico di Arcetri, L.go E. Fermi 5, 50125, Firenze, Italy ; INAF-Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122, Padova, Italy
Avenhaus, H.;  Institute for Astronomy, ETH Zurich, Wolfgang-Pauli Strasse 27, 8093, Zurich, Switzerland ; Max-Planck Institute for Astronomy, Königstuhl 17, 69117, Heidelberg, Germany ; Universidad de Chile, Camino el Observatorio, 1515, Santiago, Chile
Baruffolo, A.;  INAF-Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122, Padova, Italy
Baudino, J. L.;  Department of Physics, University of Oxford, Parks Rd, Oxford, OX1 3PU, UK
Beuzit, J. L.;  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, 75013, Paris, France
Bruno, P.;  INAF-Osservatorio Astronomico di Catania, via Santa Sofia, 78, Catania, Italy
Buey, T.;  LESIA, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC Univ. Paris 06, Univ. Paris Diderot, Sorbonne Paris Cité, 75013, Paris, France
Carbillet, M.;  Núcleo de Astronomía, Facultad de Ingeniería, Universidad Diego Portales, Av. Ejercito 441, Santiago, Chile
Cascone, E.;  INAF-Osservatorio Astronomico di Capodimonte, Salita Moiariello 16, 80131, Napoli, Italy
Chauvin, G.;  Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Claudi, R. U.;  INAF-Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122, Padova, Italy
De Caprio, V.;  INAF-Osservatorio Astronomico di Capodimonte, Salita Moiariello 16, 80131, Napoli, Italy
Fantinel, D.;  INAF-Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122, Padova, Italy
Farisato, G.;  INAF-Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122, Padova, Italy
Feldt, M.;  Max-Planck Institute for Astronomy, Königstuhl 17, 69117, Heidelberg, Germany
Galicher, R.;  LESIA, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC Univ. Paris 06, Univ. Paris Diderot, Sorbonne Paris Cité, 75013, Paris, France
Giro, E.;  INAF-Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122, Padova, Italy
Gry, C.;  Aix Marseille Univ., CNRS, LAM, Laboratoire d'Astrophysique de Marseille, 13013, Marseille, France
Hagelberg, J.;  Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Incorvaia, S.;  INAF - Istituto di Astrofisica Spaziale e Fisica Cosmica di Milano, via E. Bassini 15, 20133, Milano, Italy
Janson, M.;  Max-Planck Institute for Astronomy, Königstuhl 17, 69117, Heidelberg, Germany ; Department of Astronomy, Stockholm University, AlbaNova University Center, 106 91, Stockholm, Sweden
Jaquet, M.;  Aix Marseille Univ., CNRS, LAM, Laboratoire d'Astrophysique de Marseille, 13013, Marseille, France
Lagrange, A. M.;  Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Langlois, M.;  Aix Marseille Univ., CNRS, LAM, Laboratoire d'Astrophysique de Marseille, 13013, Marseille, France
Lannier, J.;  Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Le Coroller, H.;  Aix Marseille Univ., CNRS, LAM, Laboratoire d'Astrophysique de Marseille, 13013, Marseille, France
Lessio, L.;  INAF-Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122, Padova, Italy
Ligi, R.;  Aix Marseille Univ., CNRS, LAM, Laboratoire d'Astrophysique de Marseille, 13013, Marseille, France
Maire, Anne-Lise ;  Max Planck Institute for Astronomy, Königstuhl 17, 69117, Heidelberg, Germany
Meyer, M.;  Institute for Astronomy, ETH Zurich, Wolfgang-Pauli Strasse 27, 8093, Zurich, Switzerland ; Department of Astronomy, University of Michigan, 1085 S. University, Ann Arbor, MI, 48109, USA
Menard, F.;  Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France ; European Southern Observatory (ESO), Karl-Schwarzschild-Str. 2, 85748, Garching, Germany
Perrot, C.;  LESIA, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC Univ. Paris 06, Univ. Paris Diderot, Sorbonne Paris Cité, 75013, Paris, France
Peretti, S.;  Observatoire Astronomique de l'Université de Genève, Chemin des Maillettes 51, 1290, Sauverny, Switzerland
Petit, C.;  ONERA (Office National d’Études et de Recherches Aérospatiales), BP 72, 92322 Châtillon, France
Ramos, J.;  Max-Planck Institute for Astronomy, Königstuhl 17, 69117, Heidelberg, Germany
Roux, A.;  Univ. Grenoble Alpes, CNRS, IPAG, 38000, Grenoble, France
Salasnich, B.;  INAF-Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122, Padova, Italy
Salter, G.;  Aix Marseille Univ., CNRS, LAM, Laboratoire d'Astrophysique de Marseille, 13013, Marseille, France
Samland, M.;  Max-Planck Institute for Astronomy, Königstuhl 17, 69117, Heidelberg, Germany
Scuderi, S.;  INAF-Osservatorio Astronomico di Catania, via Santa Sofia, 78, Catania, Italy
Schlieder, J.;  Max-Planck Institute for Astronomy, Königstuhl 17, 69117, Heidelberg, Germany ; NASA Goddard Space Flight Center, Greenbelt, MD, 20771, USA
Surez, M.;  ONERA (Office National d'Études et de Recherches Aérospatiales), BP 72, 92322, Châtillon, France
Turatto, M.;  INAF-Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122, Padova, Italy
Weber, L.;  Observatoire Astronomique de l'Université de Genève, Chemin des Maillettes 51, 1290, Sauverny, Switzerland)
More authors (46 more) Less
Language :
English
Title :
Orbiting a binary. SPHERE characterisation of the HD 284149 system
Publication date :
01 December 2017
Journal title :
Astronomy and Astrophysics
ISSN :
0004-6361
eISSN :
1432-0746
Publisher :
EDP Sciences, Les Ulis, France
Volume :
608
Pages :
A106
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
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