Concept information
Preferred term
Y dwarfs
Definition
- A type of ultra-cool brown dwarf with an effective temperature lower than 500 K. Near infrared spectra of these objects show deep absorption bands of H_{2}O and CH_4. So far only seven brown dwarf candidates belonging to this class have been found, all Y0 subtypes. These objects are very dim, with H magnitudes 19-23. The precise definition of the Y class requires new findings in the future about these objects. (en)
Broader concept
- Brown dwarfs (en)
Entry terms
- Y brown dwarfs (en)
- Y dwarf stars (en)
- Y-type brown dwarfs (en)
Editorial note
URI
http://astrothesaurus.org/uat/1827
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