Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.14/137620
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- Title
- Visual obit of the low-mass binary GJ 164 AB
- Related
- Astrophysical journal, Vol. 695, No. 2, (2009), p.1183-1190
- DOI
- 10.1088/0004-637X/695/2/1183
- Publisher
- Institute of Physics Publishing
- Date
- 2009
- Author/Creator
- Martinache, Frantz
- Author/Creator
- Rojas-Ayala, Barbara
- Author/Creator
- Ireland, Michael J.
- Author/Creator
- Lloyd, James P
- Author/Creator
- Tuthill, Peter G
- Description
- We report seven successful observations of the astrometric binary GJ 164 AB system with aperture masking interferometry. The companion, with a near-infrared contrast of 5: 1 was detected beyond the formal diffraction limit. Combined with astrometric observations from the literature, these observations fix the parallax of the system, and allow a model-independent mass determination of both components. We find the mass of GJ 164 B to be 0.096 +/- 0.008 M(circle dot). With data taken with the newly commissioned TripleSpec spectrograph, we examine GJ 164's near-infrared spectral features and compare them to a sample of M dwarfs of known metallicity. Models are not consistent with color and mass, requiring a very young age to accommodate a secondary too luminous, a scenario ruled out by the kinematics.
- Description
- 8 page(s)
- Subject Keyword
- stars: low-mass, brown dwarfs
- Subject Keyword
- techniques: high angular resolution
- Subject Keyword
- techniques: spectroscopic
- Resource Type
- journal article
- Organisation
- Macquarie University. Dept. of Physics and Astronomy
- Identifier
- http://hdl.handle.net/1959.14/137620
- Identifier
- ISSN:0004-637X
- Identifier
- mq_res-ext-201109141133-6
- Language
- eng
- Reviewed
