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- Cheetham, A. (author)
Discovery of a brown dwarf companion to the star HIP 64892
- Article/chapterEnglish2018
Publisher, publication year, extent ...
- 2018-08-01
- EDP Sciences,2018
- printrdacarrier
Numbers
- LIBRIS-ID:oai:DiVA.org:su-159000
- https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-159000URI
- https://doi.org/10.1051/0004-6361/201832650DOI
Supplementary language notes
- Language:English
- Summary in:English
Part of subdatabase
- SwePubSwePub
Classification
Notes
- 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 +/- 12AU. 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 gamma +/- 1. From comparison with the BT-Settl atmospheric models we estimate an effective temperature of T-eff = 2600 +/- 100 K, and comparison of the companion photometry to the COND evolutionary models yields a mass of similar to 29-37 M-J at the estimated age of 16(-7)(+15) Myr for the system. The star HIP 64892 is a rare example of an extreme-mass ratio system (q similar to 0.01) and will be useful for testing models relating to the formation and evolution of such low-mass objects.
Subject headings and genre
- NATURVETENSKAP Fysik Astronomi, astrofysik och kosmologi hsv//swe
- NATURAL SCIENCES Physical Sciences Astronomy, Astrophysics and Cosmology hsv//eng
- brown dwarfs
- stars: individual: HIP 64892
- techniques: high angular resolution
- planets and satellites: detection
- planets and satellites: atmospheres
Added entries (persons, corporate bodies, meetings, titles ...)
- Bonnefoy, M. (author)
- Desidera, S. (author)
- Langlois, M. (author)
- Vigan, A. (author)
- Schmidt, T. (author)
- Olofsson, J. (author)
- Chauvin, G. (author)
- Klahr, H. (author)
- Gratton, R. (author)
- D'Orazi, V. (author)
- Henning, T. (author)
- Janson, MarkusStockholms universitet,Institutionen för astronomi,Max Planck Institute for Astronomy, Germany(Swepub:su)mjanso (author)
- Biller, B. (author)
- Peretti, S. (author)
- Hagelberg, J. (author)
- Segransan, D. (author)
- Udry, S. (author)
- Mesa, D. (author)
- Sissa, E. (author)
- Kral, Q. (author)
- Schlieder, J. (author)
- Maire, A. -L. (author)
- Mordasini, C. (author)
- Menard, F. (author)
- Zurlo, A. (author)
- Beuzit, J. -L. (author)
- Feldt, M. (author)
- Mouillet, D. (author)
- Meyer, M. (author)
- Lagrange, A. -M. (author)
- Boccaletti, A. (author)
- Keppler, M. (author)
- Kopytova, T. (author)
- Ligi, R. (author)
- Rouan, D. (author)
- Le Coroller, H. (author)
- Dominik, C. (author)
- Lagadec, E. (author)
- Turatto, M. (author)
- Abe, L. (author)
- Antichi, J. (author)
- Baruffolo, A. (author)
- Baudoz, P. (author)
- Blanchard, P. (author)
- Buey, T. (author)
- Carbillet, M. (author)
- Carle, M. (author)
- Cascone, E. (author)
- Claudi, R. (author)
- Costille, A. (author)
- Delboulbe, A. (author)
- De Caprio, V. (author)
- Dohlen, K. (author)
- Fantinel, D. (author)
- Feautrier, P. (author)
- Fusco, T. (author)
- Giro, E. (author)
- Gluck, L. (author)
- Hubin, N. (author)
- Hugot, E. (author)
- Jaquet, M. (author)
- Kasper, M. (author)
- Llored, M. (author)
- Madec, F. (author)
- Magnard, Y. (author)
- Martinez, P. (author)
- Maurel, D. (author)
- Le Mignant, D. (author)
- Moeller-Nilsson, O. (author)
- Moulin, T. (author)
- Origne, A. (author)
- Pavlov, A. (author)
- Perret, D. (author)
- Petit, C. (author)
- Pragt, J. (author)
- Puget, P. (author)
- Rabou, P. (author)
- Ramos, J. (author)
- Rigal, F. (author)
- Rochat, S. (author)
- Roelfsema, R. (author)
- Rousset, G. (author)
- Roux, A. (author)
- Salasnich, B. (author)
- Sauvage, J. -F. (author)
- Sevin, A. (author)
- Soenke, C. (author)
- Stadler, E. (author)
- Suarez, M. (author)
- Weber, L. (author)
- Wildi, F. (author)
- Stockholms universitetInstitutionen för astronomi (creator_code:org_t)
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- Cheetham, A.
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- Desidera, S.
- Langlois, M.
- Vigan, A.
- Schmidt, T.
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- Olofsson, J.
- Chauvin, G.
- Klahr, H.
- Gratton, R.
- D'Orazi, V.
- Henning, T.
- Janson, Markus
- Biller, B.
- Peretti, S.
- Hagelberg, J.
- Segransan, D.
- Udry, S.
- Mesa, D.
- Sissa, E.
- Kral, Q.
- Schlieder, J.
- Maire, A. -L.
- Mordasini, C.
- Menard, F.
- Zurlo, A.
- Beuzit, J. -L.
- Feldt, M.
- Mouillet, D.
- Meyer, M.
- Lagrange, A. -M.
- Boccaletti, A.
- Keppler, M.
- Kopytova, T.
- Ligi, R.
- Rouan, D.
- Le Coroller, H.
- Dominik, C.
- Lagadec, E.
- Turatto, M.
- Abe, L.
- Antichi, J.
- Baruffolo, A.
- Baudoz, P.
- Blanchard, P.
- Buey, T.
- Carbillet, M.
- Carle, M.
- Cascone, E.
- Claudi, R.
- Costille, A.
- Delboulbe, A.
- De Caprio, V.
- Dohlen, K.
- Fantinel, D.
- Feautrier, P.
- Fusco, T.
- Giro, E.
- Gluck, L.
- Hubin, N.
- Hugot, E.
- Jaquet, M.
- Kasper, M.
- Llored, M.
- Madec, F.
- Magnard, Y.
- Martinez, P.
- Maurel, D.
- Le Mignant, D.
- Moeller-Nilsson, ...
- Moulin, T.
- Origne, A.
- Pavlov, A.
- Perret, D.
- Petit, C.
- Pragt, J.
- Puget, P.
- Rabou, P.
- Ramos, J.
- Rigal, F.
- Rochat, S.
- Roelfsema, R.
- Rousset, G.
- Roux, A.
- Salasnich, B.
- Sauvage, J. -F.
- Sevin, A.
- Soenke, C.
- Stadler, E.
- Suarez, M.
- Weber, L.
- Wildi, F.
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