Direct-imaging discovery of a 12–14 Jupiter-mass object orbiting a young binary system of very low-mass stars
| Autor: | J. H. Girard, L. Malo, David Lafrenière, M-E. Naud, G. Chauvin, René Doyon, Adric R. Riedel, Anne-Marie Lagrange, M. Bonnefoy, Jonathan Gagné, P. Delorme |
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| Rok vydání: | 2013 |
| Předmět: |
Physics
Proper motion Star formation Brown dwarf FOS: Physical sciences Astronomy and Astrophysics Astrophysics Exoplanet Orbit Stars Astrophysics - Solar and Stellar Astrophysics Space and Planetary Science Planet Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics Solar and Stellar Astrophysics (astro-ph.SR) Astrophysics::Galaxy Astrophysics Jupiter mass |
| Zdroj: | Astronomy & Astrophysics. 553:L5 |
| ISSN: | 1432-0746 0004-6361 |
| DOI: | 10.1051/0004-6361/201321169 |
| Popis: | Context. Though only a handful of extrasolar planets have been discovered via direct imaging, each of these discoveries had tremendous impact on our understanding of planetary formation, stellar formation and cool atmosphere physics. Aims. Since many of these newly imaged giant planets orbit massive A or even B stars we investigated whether giant planets could be found orbiting low-mass stars at large separations. Methods. We have been conducting an adaptive optic imaging survey to search for planetary-mass companions of young M dwarfs of the solar neigbourhood, to probe different initial conditions of planetary formation. Results. We report here the direct imaging discovery of 2MASS J01033563-5515561(AB)b, a 12-14 MJup companion at a projected separation of 84 AU from a pair of young late M stars, with which it shares proper motion. We also detected a Keplerian-compatible orbital motion. Conclusions. This young L-type object at planet/brown dwarf mass boundary is the first ever imaged around a binary system at a separation compatible with formation in a disc. Accepted in A&A letters |
| Databáze: | OpenAIRE |
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