Spectroscopy of a Young Brown Dwarf

Details Spectroscopy of a Young Brown Dwarf Spectroscopy of a Young Brown Dwarf

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aas...183.5805r&link_type=abstract

American Astronomical Society, 183rd AAS Meeting, #58.05; Bulletin of the American Astronomical Society, Vol. 25, p.1385

Astronomy and Astrophysics

Astronomy

Scientific paper

We report a spectrum at 2microns of a brown dwarf candidate in the rho Ophiuchi star forming cluster. This object is source 2320.8-1721 in the study of Comeron et. al. (ApJ 416, 185), who suggested that it is a young brown dwarf on the basis of modeling its photometric colors and luminosity. Its spectrum shows extremely strong Na absorption, as well as features due to FeI and CO. Compared with similar spectra of a suite of very cool evolved M dwarfs, the spectrum shows that the near infrared flux comes from the photosphere of an extremely cool object. We use the new temperature constraints for the object and repeat the photometric modeling with updated brown dwarf isochrones. The results strongly support the identification of 2323.8-1721 as a young brown dwarf, of mass approximately 0.02 to 0.03 solar masses.

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