Discovery of a brown dwarf companion to the star HIP 64892
- Cheetham, A.
- Bonnefoy, M.
- Desidera, S.
- Langlois, M.
- Vigan, A.
- Schmidt, T.
- Olofsson, J.
- Chauvin, G.
- Klahr, H.
- Gratton, R.
- D’Orazi, V.
- Henning, T.
- Janson, M.
- Biller, B.
- Peretti, S.
- Hagelberg, J.
- Ségransan, D.
- Udry, S.
- Mesa, D.
- Sissa, E.
- Kral, Q.
- Schlieder, J.
- Maire, A.-L.
- Mordasini, Christoph
- 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.
- Delboulbé, 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.
- Möller-Nilsson, O.
- Moulin, T.
- Origné, 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.
DOIAbstract
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 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 M9γ±1. From comparison with the BT-Settl atmospheric mode...
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