Astronomy and Astrophysics – Astrophysics
Scientific paper
1998-01-17
Astronomy and Astrophysics
Astrophysics
3 pages, 2 figures
Scientific paper
10.1046/j.1365-8711.1998.01642.x
Observations are presented which show that LiI 6708A is detected with
equivalent width of 0.53+-0.05A in the proper-motion object LP 944-20 (which is
also known as BRI 0337-3535). This Li detection implies that LP 944-20 is a
brown dwarf with mass between 0.057 and 0.063Mo and age between 475 and 650Myr,
making it the first brown dwarf to have its mass and age precisely determined.
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