T dwarfs

http://astrothesaurus.org/uat/1679

alt label
T brown dwarfs
T dwarf stars
T-type brown dwarfs
dcterms modified equal to or less than 2020-11-04T19:45:47.000Zequal to or more than 2020-11-04T19:45:47.000Z
broader
http://astrothesaurus.org/uat/185 original
narrower
1679 original
http://astrothesaurus.org/uat/2053 original
narrower
1679 original
http://astrothesaurus.org/uat/906 original
narrower
1679 original
definition A type of brown dwarf with an effective temperature between about 1200 K and 500 K, i.e. colder than the preceding type L dwarf. The spectra of T dwarfs are characterized by the presence of methane bands in the near infrared. The presence of these bands, broad H_{2}O features, and H_2 collision-induced absorption radically alter the spectral energy distributions of T dwarfs compared to a black body at the same temperature. Hence near-infrared colors become increasingly blue (J - K ~ 0) as compared to L dwarfs. The first T dwarf, called Gl 229B, was discovered by Nakajima et al. The spectral classification scheme (subtypes T0 to T9) currently used was defined by Burgasser et al.
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Resource original
Concept original
contributor AAS_Frey.Katie_Admin original