Discovery of Four Field Methane (T-Type) Dwarfs with the Two Micron All-Sky Survey

We report the discovery of four field methane ("T"-type) brown dwarfs using Two Micron All-Sky Survey (2MASS) data. One additional methane dwarf, previously discovered by the Sloan Digital Sky Survey, was also identified. Near-infrared spectra clearly show the 1.6 and 2.2 μm CH 4 absorption bands ch... View More