publication . Conference object . Preprint . 2004

Ultracool subdwarfs: metal-poor stars and brown dwarfs extending into the late-type M, L and T dwarf regimes

Burgasser, A. J.; Davy Kirkpatrick; Lépine, S.;
  • Published: 08 Sep 2004
Abstract
Recent discoveries from red optical proper motion and wide-field near-infrared surveys have uncovered a new population of ultracool subdwarfs -- metal-poor stars and brown dwarfs extending into the late-type M, L and possibly T spectral classes. These objects are among the first low-mass stars and brown dwarfs formed in the Galaxy, and are valuable tracers of metallicity effects in low-temperature atmospheres. Here we review the spectral, photometric, and kinematic properties of recent discoveries. We also examine L subdwarf classification, and discuss how a large, complete sample of substellar halo subdwarfs could probe the star formation history of the Galaxy'...
Subjects
arXiv: Astrophysics::Solar and Stellar AstrophysicsAstrophysics::Galaxy AstrophysicsAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysics::Earth and Planetary Astrophysics
free text keywords: Astrophysics
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publication . Conference object . Preprint . 2004

Ultracool subdwarfs: metal-poor stars and brown dwarfs extending into the late-type M, L and T dwarf regimes

Burgasser, A. J.; Davy Kirkpatrick; Lépine, S.;