The Unified Astronomy Thesaurus

http://astrothesaurus.org/uat/1827

alt label
Y brown dwarfs
Y dwarf stars
Y-type brown dwarfs
dcterms created equal to or less than 2016-11-02T16:04:07.000Zequal to or more than 2016-11-02T16:04:07.000Z
dcterms modified equal to or less than 2021-09-27T15:42:16.086Zequal to or more than 2021-09-27T15:42:16.086Z
broader
http://astrothesaurus.org/uat/185 original
narrower
1827 original
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.
type
Resource original
Concept original
contributor AAS_Frey.Katie_Admin original
creator AAS_Frey.Katie_Admin original