Discovery of a Bright Field Methane (T-type) Brown Dwarf by 2MASS


We report the discovery of a bright (J = 13.83±0.03) methane brown dwarf, or T dwarf, by the Two Micron All Sky Survey. This object, 2MASSI J0559191-140448, is the first brown dwarf identified by the newly commissioned CorMASS instrument mounted on the Palomar 60-inch Telescope. Near-infrared spectra from 0.9 2.35 μm show characteristic CH4 bands at 1.1, 1… (More)


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