Direct Detection of the Brown Dwarf GJ 802B with Adaptive Optics Masking Interferometry

Details Direct Detection of the Brown Dwarf GJ 802B with Adaptive Optics Masking Interferometry Direct Detection of the Brown Dwarf GJ 802B with Adaptive Optics Masking Interferometry

2006-07-21

arxiv.org/abs/astro-ph/0607516v1

Astrophys.J.650:L131-L134,2006

Astronomy and Astrophysics

Astrophysics

4 Pages, 5 figures, emulateapj format, submitted to ApJL

Scientific paper

10.1086/508771

We have used the Palomar 200" Adaptive Optics (AO) system to directly detect the astrometric brown dwarf GJ 802B reported by Pravdo et al. 2005. This observation is achieved with a novel combination of aperture masking interferometry and AO. The dynamical masses are 0.175$\pm$0.021 M$_\odot$ and 0.064$\pm$0.032 M$_\odot$ for the primary and secondary respectively. The inferred absolute H band magnitude of GJ 802B is M$_H$=12.8 resulting in a model-dependent T$_\mathrm{eff}$ of 1850 $\pm$ 50K and mass range of 0.057--0.074 M$_\odot$.

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