Unified Astronomy Thesaurus

Last uploaded: June 20, 2024
Preferred Name

T dwarfs

Synonyms

T brown dwarfs

Definitions

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.

ID

http://astrothesaurus.org/uat/1679

altLabel

T brown dwarfs

T-type brown dwarfs

T dwarf stars

broader

http://astrothesaurus.org/uat/185

http://astrothesaurus.org/uat/2053

http://astrothesaurus.org/uat/906

contributor

http://editor.vocabs.ands.org.au/user/AAS_Frey.Katie_Admin

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.

modified

2021-09-27T15:42:06.537Z

2020-11-04T19:46:01.009Z

prefLabel

T dwarfs

T dwarves

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