A Hubble Space Telescope Advanced Camera for Surveys Search for Brown Dwarf Binaries in the Pleiades Open Cluster

Bibcode
2006ApJ...637.1056B
DOI
10.1086/498350
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
The Astrophysical Journal
Number of authors
8
IAC number of authors
2
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
Type
Refereed
Luminosity function

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