Late-type dwarf stars
type: Concept
narrower: L dwarfs

L dwarfs
type: Concept
definition: A type of brown dwarf with an effective temperature ranging from about 2200 K to about 1300 K, corresponding to luminosities about 4 x 10^-4 to 3 x 10^-5 times that of the Sun. L dwarfs are intermediate in temperature between M and T dwarfs. Their spectra in the optical show weak titanium oxide (TiO) and vanadium oxide (VO) absorption lines and strong metallic hydrides CrH (8611 and 9969 Å) and FeH (8692 and 9896 Å). Also are present strong neutral atomic lines of alkali metals Na I (8183, 8195 Å), K I (7665, 7699 Å), Rb I (7800, 7948 Å), Cs I (8521, 8943 Å), and sometimes Li I (6708 Å). The prototype of the L-dwarf class is GD 165B.
contributor: AAS Frey.Katie Admin
alternative label: L brown dwarfs
alternative label: L-type brown dwarfs
alternative label: L dwarf stars
broader: Brown dwarfs
broader: Late-type dwarf stars
modified: 2021-09-27T15:41:57.73Z
modified: 2020-11-03T16:30:25.506Z
preferred label: L dwarves

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