DENIS-P J1228.2−1547—A New Benchmark Brown Dwarf
Open Access
- 20 November 1997
- journal article
- research article
- Published by IOP Publishing in The Astrophysical Journal
- Vol. 490 (1) , L95-L98
- https://doi.org/10.1086/311011
Abstract
We present optical spectroscopy of three brown dwarf candidates identified in the first 1% of the DENIS sky survey. Low-resolution spectra from 6430 to 9150 Å show these objects to have similar spectra to the brown dwarf candidate GD 165B. High-resolution spectroscopy shows that one of the objects—DENIS-P J1228.2-1547—has a strong 2.3 ± 0.05 Å equivalent width absorption line of Li I λ6708 and is therefore a brown dwarf with mass below 0.065 M☉, and age 1.5 Gyr. DENIS-P J1228.2-1547 can now be considered a prototype for brown dwarfs closer to the hydrogen-burning limit than Gl 229B.Keywords
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