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Identification of a Wide, Low-Mass Multiple System Containing the Brown Dwarf 2MASS J0850359+105716
Jacqueline K. Faherty, Adam J. Burgasser, John J. Bochanski +3
We report our discovery of NLTT 20346 as an M5+M6 companion system to the tight binary (or triple) L dwarf 2MASS J0850359+105716. This nearby (~31 pc), widely separated (~7700 AU)…
Cool Star Science with the FIRE Spectrograph
Adam J. Burgasser, Robert A. Simcoe, John J. Bochanski +7
The Folded-port InfraRed Echellette (FIRE) has recently been commissioned on the Magellan 6.5m Baade Telescope. This single object, near-infrared spectrometer simultaneously covers…
Hubble Space Telescope Imaging and Spectral Analysis of Two Brown Dwarf Binaries at the L Dwarf/T Dwarf Transition
Adam J. Burgasser, Daniella C. Bardalez Gagliuffi, John E. Gizis
We present a detailed examination of the brown dwarf multiples 2MASS J08503593+1057156 and 2MASS J17281150+3948593, both suspected of harboring components that straddle the L dwarf…
Resolved Spectroscopy of M Dwarf/L Dwarf Binaries. IV. Discovery of an M9 + L6 BInary Separated by Over 100 AU
Saurav Dhital, Adam J. Burgasser, Dagny L. Looper +1
We report the discovery of a faint L6 \pm 1 companion to the previously known M9 dwarf, 2MASS J01303563-4445411, based on our near-infrared imaging and spectroscopic observations w…
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…
A Widely-Separated, Highly-Occluded Companion to the Nearby Low-Mass T Tauri Star TWA 30
Dagny L. Looper, John J. Bochanski, Adam J. Burgasser +5
We report the discovery of TWA 30B, a wide (~3400 AU), co-moving M dwarf companion to the nearby (~42 pc) young star TWA 30. Companionship is confirmed from their statistically con…