Candidate brown dwarfs in the Hyades

Details Candidate brown dwarfs in the Hyades Candidate brown dwarfs in the Hyades

Mar 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...388l..23b&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 388, March 20, 1992, p. L23-L26.

Physics

21

Brown Dwarf Stars, M Stars, Star Clusters, Stellar Physics, Spectral Energy Distribution, Stellar Luminosity, Stellar Mass, Stellar Spectrophotometry

Scientific paper

Several faint, red objects were identified in the Hyades region, which are believed to be very low mass M dwarf and substellar mass 'brown dwarf' members of the Hyades cluster. Proper motions for these stars, measured from Palomar Schmidt plates obtained at three different epochs, have the magnitude and direction of motion expected for membership in the cluster. Infrared JHK photometry of these stars show colors typical of late M dwarfs, but the optical colors of most of the brown dwarf candidates are anomalous. The luminosities of the faintest stars derived from the infrared photometry agree well with model predictions for 0.07-solar mass brown dwarfs at the age of the Hyades, although the colors are bluer than models predict.

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