Y dwarves
type: Concept
modified: 2020-11-04T20:58:47.692Z
modified: 2021-09-27T15:42:16.086Z
created: 2016-11-02T16:04:07Z
preferred label: Y dwarfs
contributor: AAS Frey.Katie Admin
creator: AAS Frey.Katie Admin
alternative label: Y brown dwarfs
alternative label: Y dwarf stars
alternative label: Y-type brown dwarfs
broader: Brown 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.

Brown dwarfs
type: Concept
preferred label: Brown dwarves
narrower: Y dwarves