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Spitzer Mid-Infrared Photometry of 500 - 750 K Brown Dwarfs
S. K. Leggett, L. Albert, E. Artigau +11
Mid-infrared data, including Spitzer warm-IRAC [3.6] and [4.5] photometry, is critical for understanding the cold population of brown dwarfs now being found, objects which have mor…
The First Ultra-Cool Brown Dwarf Discovered by the Wide-field Infrared Survey Explorer
A. Mainzer, Michael C. Cushing, M. Skrutskie +17
We report the discovery of the first new ultra-cool brown dwarf found with the Wide-field Infrared Survey Explorer (WISE). The object's preliminary designation is WISEPC J045853.90…
A Patchy Cloud Model for the L to T Dwarf Transition
Mark S. Marley, Didier Saumon, Colin Goldblatt
One of the mechanisms suggested for the L to T dwarf spectral type transition is the appearance of relatively cloud-free regions across the disk of brown dwarfs as they cool. The e…
Clouds in the Coldest Brown Dwarfs: FIRE Spectroscopy of Ross 458C
Adam J. Burgasser, Robert A. Simcoe, John J. Bochanski +7
Condensate clouds are a salient feature of L dwarf atmospheres, but have been assumed to play little role in shaping the spectra of the coldest T-type brown dwarfs. Here we report…
SDSS J141624.08+134826.7: Blue L Dwarfs and Non-Equilibrium Chemistry
Michael C. Cushing, D. Saumon, Mark S. Marley
We present an analysis of the recently discovered blue L dwarf SDSS J141624.08+134826.7. We extend the spectral coverage of its published spectrum to ~4 microns by obtaining a low-…
Properties of the T8.5 Dwarf Wolf 940 B
S. K. Leggett, D. Saumon, Ben Burningham +3
We present 7.5-14.2um low-resolution spectroscopy, obtained with the Spitzer Infrared Spectrograph, of the T8.5 dwarf Wolf 940 B, which is a companion to an M4 dwarf with a project…