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.
Original language | English (US) |
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Pages (from-to) | L165-L168 |
Journal | Astrophysical Journal |
Volume | 489 |
Issue number | 2 PART II |
DOIs | |
State | Published - 1997 |
Keywords
- Stars: formation
- Stars: low-mass, brown dwarfs
- Stars: pre-main-sequence
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science