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Spectroscopy of a brown dwarf candidate in the Alpha Persei open cluster
Abstract
Intermediate-resolution spectroscopy in the range 625-775 nm is reported for a faint very-late-type object discovered in two CCD images taken near the center of the Alpha Per cluster. The spectrum shows strong absorption molecular bands, H-alpha emission, and KI absorption typical of late-M dwarfs; H-alpha varies conspicuously. The effective temperature and luminosity derived from the spectrum and R,I band photometry are consistent with those expected for an Alpha Per (age of about 50 Myr) 0.07 solar mass substellar object. In this object the lithium resonance line at 670.8 nm should be detectable with higher resolution, higher SNR data, and this line is a potentially powerful spectroscopic discriminant between very low mass stars and brown dwarfs close to the substellar mass limit.
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Cited by
The Limiting Effects of Dust in Brown Dwarf Model Atmospheres
Allard, F., Hauschildt, P. H., Alexander, D. R., Tamanai, A., & Schweitzer, A. (2001) · The Astrophysical Journal · doi:10.1086/321547 · Cited by 1,062
The theory of brown dwarfs and extrasolar giant planets
Burrows, A., Hubbard, W. B., Lunine, J. I., & Liebert, J. (2001) · Reviews of Modern Physics · doi:10.1103/revmodphys.73.719 · Cited by 819
The Evolution of L and T Dwarfs in Color‐Magnitude Diagrams
Saumon, D., & Marley, M. S. (2008) · The Astrophysical Journal · doi:10.1086/592734 · Cited by 693
“Lithium burning is a useful age/mass diagnostic of brown dwarfs (Rebolo et al. 1992; Basri 2000) but contributes negligibly to nuclear energy production and is not included in our code.”
BackgroundTheory of Low-Mass Stars and Substellar Objects
Chabrier, G., & Baraffe, I. (2000) · Annual Review of Astronomy and Astrophysics · doi:10.1146/annurev.astro.38.1.337 · Cited by 572
Soderblom, D. R. (2010) · Annual Review of Astronomy and Astrophysics · doi:10.1146/annurev-astro-081309-130806 · Cited by 572
Metadata
- Authors
- Rebolo, R., Martin, E. L., & Magazzu, A.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 1992-04
- Volume
- 389
- Pages
- L83
- ISSN
- 0004-637X (ISSN-L)
- 1538-4357
- OpenAlex
- W2004392715
- Cited by
- 231
- References
- 0
- FWCI
- 5.24
- Type
- journal article
- Language
- en
- Open access
- closed
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- Rebolo, R., Martin, E. L., & Magazzu, A. (1992). Spectroscopy of a brown dwarf candidate in the Alpha Persei open cluster. The Astrophysical Journal. https://doi.org/10.1086/186354
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