Journal Article

L dwarfs in the Hyades

E. Hogan, R. F. Jameson, S. L. Casewell, S. L. Osbourne and N. C. Hambly

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 388, issue 2, pages 495-499
Published in print August 2008 | ISSN: 0035-8711
Published online July 2008 | e-ISSN: 1365-2966 | DOI:
L dwarfs in the Hyades

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We present the results of a proper motion survey of the Hyades to search for brown dwarfs, based on UKIRT Deep Sky Survey (UKIDSS) and Two-Micron All Sky Survey (2MASS) data. This survey covers ∼275 deg2 to a depth of K∼ 15 mag, equivalent to a mass of ∼0.05 M 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 M. A high proportion of these L dwarfs appear to be photometric binaries.

Keywords: stars: low-mass, brown dwarfs; open clusters and associations: individual: Hyades

Journal Article.  3625 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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