Bouy, H.; Moraux, E.; Bouvier, J.; Brandner, W.; Martín, E. L.; Allard, F.; Baraffe, I.; Fernández, M.
Bibliographical reference
The Astrophysical Journal, Volume 637, Issue 2, pp. 1056-1066.
Advertised on:
2
2006
Journal
Citations
36
Refereed citations
34
Description
We present the results of a high-resolution imaging survey for brown
dwarf binaries in the Pleiades open cluster. The observations were
carried out with the Advanced Camera for Surveys (Pavlovsky and
coworkers) on board the Hubble Space Telescope. Our sample consists of
15 bona fide brown dwarfs. We confirm two binaries and detect their
orbital motion, but we did not resolve any new binary candidates in the
separation range between 5.4 and 1700 AU and masses in the range
0.035-0.065 Msolar. Together with the results of our previous
study (Martín and coworkers), we can derive a visual binary
frequency of 13.3+13.7-4.3% for separations
greater than 7 AU, masses in the range 0.055-0.065 Msolar,
and mass ratios in the range 0.45-0.9