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2001ApJ...554L..67K - Astrophys. J., 554, L67-L70 (2001/June-2)
Gliese 569B: a young multiple brown dwarf system?
KENWORTHY M., HOFMANN K.-H., CLOSE L., HINZ P., MAMAJEK E., SCHERTL D., WEIGELT G., ANGEL R., BALEGA Y.Y., HINZ J. and RIEKE G.
Abstract (from CDS):
An infrared spectrum of the blended B double obtained with the MMT has been modeled as a blend of two different spectral types, chosen to be consistent with the measured J- and K-band brightness difference of a factor of ∼2. The blended fit is not nearly as good as that to a pure M8.5+ template. Therefore, we hypothesize that the brighter component likely has two unresolved components with near equal masses, each the same as the fainter component.
If Gl 569B is a triple, our dynamical limits suggest each component has a mass of 50+23–4 MJup. We infer an age for the system of 300 Myr from its kinematic motion, which places it as a member of the Ursa Major moving group. All the above parameters are consistent with the latest DUSTY evolution models for brown dwarfs.
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Journal keyword(s): Stars: Binaries: General - Stars: Evolution - Stars: Formation - Stars: Individual: Alphanumeric: Gl 569 - Stars: Low-Mass, Brown Dwarfs
Simbad objects: 7
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