Spectroscopy of a Young Brown Dwarf in the ρ Ophiuchi Cluster
Open Access
- 1 January 1997
- journal article
- research article
- Published by American Astronomical Society in The Astrophysical Journal
- Vol. 489 (2) , L165-L168
- https://doi.org/10.1086/316784
Abstract
We present observations of a young (~3-10 Myr old) brown dwarf within the ρ Ophiuchi star-forming region. A low-resolution optical spectrum exhibits a spectral type of M8.5 ± 0.5 and strong Hα emission (Wλ ~ 60 Å). 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☉. A more accurate mass estimate will require tests of the evolutionary tracks and temperature scales at such young ages and late types.Keywords
This publication has 24 references indexed in Scilit:
- A Near‐Infrared Imaging Survey of the ρ Ophiuchi Cloud CoreThe Astrophysical Journal Supplement Series, 1997
- The Palomar/MSU Nearby Star Spectroscopic Survey.II.The Southern M Dwarfs and Investigation of Magnetic ActivityThe Astronomical Journal, 1996
- Synthetic Spectra and Mass Determination of the Brown Dwarf Gliese 229BThe Astrophysical Journal, 1996
- Lithium in Brown Dwarf Candidates: The Mass and Age of the Faintest Pleiades StarsThe Astrophysical Journal, 1996
- ROSAT X-ray sources embedded in the rho Ophiuchi cloud coreThe Astrophysical Journal, 1995
- An infrared spectral sequence for M dwarfsMonthly Notices of the Royal Astronomical Society, 1994
- The science of brown dwarfsReviews of Modern Physics, 1993
- Effective temperatures of M dwarfsThe Astrophysical Journal, 1992
- A standard stellar spectral sequence in the red/near-infrared - Classes K5 to M9The Astrophysical Journal Supplement Series, 1991
- Ansolute Magnitudes of Stars in the Scorpo-Centaurus Association.The Astrophysical Journal, 1958