Spectroscopy of a Young Brown Dwarf in the rho Ophiuchi Cluster 1

Details Spectroscopy of a Young Brown Dwarf in the rho Ophiuchi Cluster 1 Spectroscopy of a Young Brown Dwarf in the rho Ophiuchi Cluster 1

Nov 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997apj...489l.165l&link_type=abstract

Astrophysical Journal Letters v.489, p.L165

Astronomy and Astrophysics

Astronomy

75

Stars: Formation, Stars: Low-Mass, Brown Dwarfs, Stars: Pre-Main-Sequence

Scientific paper

We present observations of a young (~3--10 Myr old) brown dwarf within the rho Ophiuchi star-forming region. A low-resolution optical spectrum exhibits a spectral type of M8.5 +/- 0.5 and strong H alpha emission (W lambda ~ 60 A). After demonstrating the youth of this source through several additional lines of evidence, we place it on the H-R diagram and use the latest evolutionary tracks to derive a substellar mass of 0.01--0.06 M solar . A more accurate mass estimate will require tests of the evolutionary tracks and temperature scales at such young ages and late types.

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