A new population of brown dwarfs

Details A new population of brown dwarfs A new population of brown dwarfs

Mar 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998mnras.294..505h&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 294, p. 505

Astronomy and Astrophysics

Astronomy

10

Brown Dwarf Stars, Star Distribution, Stellar Evolution, Stellar Luminosity, Stellar Parallax, Astronomical Photography, Molecular Absorption, Ccd Cameras, Astronomical Photometry

Scientific paper

We report the first results from a survey for low-mass stars and brown dwarfs, based on a photographic stack of around 100 Schmidt plates. This survey extends photographic searches by about 2 mag, and covers an area of 25 sq deg. Some 30 faint objects with large R-I colors were selected for further study, and were found to have very strong molecular absorption in their spectra, but only moderately red infrared colors. Five of these stars were selected for a parallax program; three of these were found to be at a distance of around 45 pc, implying a very low luminosity. On the basis of their luminosity alone it is clear that these stars are field brown dwarfs, and we discuss their likely evolutionary status in the context of current models of low-mass stellar evolution.

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