L dwarf

Related Overviews


More Like This

Show all results sharing this subject:

  • Astronomy and Astrophysics


Show Summary Details

Quick Reference

A spectral classification applied to cool, faint stars at the bottom end of the main sequence. Objects that fall into this category are the lowest-mass red dwarfs and the sub-stars known as brown dwarfs. L dwarfs have surface temperatures in the range about 2200–1300 K. Their spectra show absorption caused by hydrides, i.e. hydrogen attached to atoms of metals such as iron and chromium, as well as features due to neutral alkali metals such as potassium, caesium, and rubidium. The presence of strong lithium absorption lines in the spectrum is proof that the object is a brown dwarf. Masses are estimated in the range 0.06–0.09 Suns (i.e. 60–90 Jupiters).

Subjects: Astronomy and Astrophysics.

Reference entries

Users without a subscription are not able to see the full content. Please, subscribe or login to access all content.