168 citations · 299 across the 9 of their papers we have counts for
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Discovery of Two Nearby, Peculiar L Dwarfs from the 2MASS Proper Motion Survey: Young or Metal-Rich?
Dagny L. Looper, J. Davy Kirkpatrick, Roc M. Cutri +9
We present the discovery of two nearby L dwarfs from our 2MASS proper motion search, which uses multi-epoch 2MASS observations covering ~4700 square degrees of sky. 2MASS J18212815…
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…
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…
Discovery of a 66 mas Ultracool Binary with Laser Guide Star Adaptive Optics
Nick Siegler, Laird M. Close, Adam J. Burgasser +4
We present the discovery of 2MASS J21321145+1341584AB as a closely separated (0.066") very low-mass field dwarf binary resolved in the near-infrared by the Keck II Telescope using…
Ultracool Subdwarfs: Subsolar Metallicity Objects Down to Substellar Masses
Adam J. Burgasser
In the past few years, astronomers have uncovered several very low-temperature, metal-poor stars with halo or thick disk kinematics and peculiar spectral and photometric properties…
Spitzer Studies of Ultracool Subdwarfs: Metal-poor Late-type M, L and T Dwarfs
Adam J. Burgasser
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 ext…