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Discovery of an M9.5 Candidate Brown Dwarf in the TW Hydrae Association - DENIS J124514.1-442907
Dagny L. Looper, Adam J. Burgasser, J. Davy Kirkpatrick +1
We report the discovery of a fifth candidate substellar system in the ~5-10 Myr TW Hydrae Association - DENIS J124514.1-442907. This object has a NIR spectrum remarkably similar to…
Clouds, Gravity and Metallicity in Blue L dwarfs: The Case of 2MASS J11263991-5003550
Adam J. Burgasser, Dagny L. Looper, J. Davy Kirkpatrick +2
Optical and near-infrared spectroscopy of the newly discovered peculiar L dwarf 2MASS J11263991-5003550 are presented. Folkes et al. identified this source as a high proper motion…
Parallax and Luminosity Measurements of an L Subdwarf
Adam J. Burgasser, Frederick J. Vrba, Sébastien Lépine +5
We present the first parallax and luminosity measurements for an L subdwarf, the sdL7 2MASS J05325346+8246465. Observations conducted over three years by the USNO infrared astromet…
SDSS J080531.84+481233.0: An Unresolved L Dwarf/T Dwarf Binary
Adam J. Burgasser
SDSS J080531.84+481233.0 is a peculiar L-type dwarf that exhibits unusually blue near-infrared and mid-infrared colors and divergent optical (L4) and near-infrared (L9.5) spectral…
Discovery of 11 New T Dwarfs in the Two Micron All-Sky Survey, Including a Possible L/T Transition Binary
Dagny L. Looper, J. Davy Kirkpatrick, Adam J. Burgasser
We present the discovery of 11 new T dwarfs, found during the course of a photometric survey for mid-to-late T dwarfs in the 2MASS Point Source Catalog and from a proper motion sel…
A New Population of Young Brown Dwarfs
Kelle L. Cruz, J. Davy Kirkpatrick, Adam J. Burgasser +5
We report the discovery of a population of late-M and L field dwarfs with unusual optical and near-infrared spectral features that we attribute to low gravity -- likely uncommonly…