L dwarfs in the Hyades

Details L dwarfs in the Hyades L dwarfs in the Hyades

2008-05-08

arxiv.org/abs/0805.1189v1

Astronomy and Astrophysics

Astrophysics

7 pages, 4 figures, 2 tables. Accepted for publication in MNRAS

Scientific paper

10.1111/j.1365-2966.2008.13437.x

We present the results of a proper motion survey of the Hyades to search for brown dwarfs, based on UKIDSS and 2MASS data. This survey covers ~275 square degrees to depth of K~15 mag, equivalent to a mass of 0.05 solar masses assuming a cluster age of 625 Myr. The discovery of 12 L dwarf Hyades members is reported. These members are also brown dwarfs, with masses between 0.05 < M < 0.075 solar masses. A high proportion of these L dwarfs appear to be photometric binaries.

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