L dwarfs


alt label
L brown dwarfs
L dwarf stars
L-type brown dwarfs
dcterms modified equal to or less than 2020-11-03T16:29:47.912Zequal to or more than 2020-11-03T16:29:47.912Z
http://astrothesaurus.org/uat/185 original
894 original
http://astrothesaurus.org/uat/906 original
894 original
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.
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Concept original
contributor AAS_Frey.Katie_Admin original