The first wide ultracool binary dwarf in the field: DENIS-J055146.0-443412.2 (M8.5 + L0)

Bibcode
2005A&A...440L..55B
DOI
10.1051/0004-6361:200500167
Billères, M.; Delfosse, X.; Beuzit, J.-L.; Forveille, T.; Marchal, L.; Martín, E. L.
Referencia bibliográfica

Astronomy and Astrophysics, Volume 440, Issue 2, September III 2005, pp.L55-L58

Fecha de publicación:
9
2005
Revista
Astronomy and Astrophysics
Número de autores
6
Número de autores del IAC
1
Número de citas
50
Número de citas referidas
48
Descripción
We present observations of a new very low mass field binary, discovered during an infrared imaging survey of 250 DENIS L and very late-M dwarfs. DENIS-J055146.0-443412.2 is an M8.5 + L0 pair, with a physical separation of over 200 AU. This makes it the widest very low mass binary known in the field, by an order of magnitude. Such a system is fragile, and it would not have survived a close encounter with a third body. Its existence demonstrate that some very low mass stars/brown dwarfs form without ejection from a multiple system, or any other strong dynamical interaction.
Tipo
Con árbitro

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