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American Astronomical Society, Astrophysical Journal, 1(490), p. L95-L98, 1997

DOI: 10.1086/311011

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DENIS-P J1228.2-1547 -- A New Benchmark Brown Dwarf

Journal article published in 1997 by C. G. Tinney ORCID, X. Delfosse, T. Forveille
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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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.