A search for wide brown dwarf companions to stars within 10pc

Details A search for wide brown dwarf companions to stars within 10pc A search for wide brown dwarf companions to stars within 10pc

2008-11-15

arxiv.org/abs/0811.2486v1

Astronomy and Astrophysics

Astrophysics

To appear in proceedings of Cool Stars XV Conference, 3 pages

Scientific paper

10.1063/1.3099175

We present the first results of a large imaging survey to identify wide brown dwarf companions to stars within 10 pc. We have performed a deep (H-band limit ~ 19.0 mag), wide field (up to 16x16 arcmin) astrometric imaging campaign in two epochs around more than 230 nearby stars. Preliminary results show that the wide low-mass companion fraction is far lower than expected, indicating that interactions with the galactic disk may have removed the weakly bound wide companions around old stars.

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