Direct Detection of the Brown Dwarf Gj 802b with Adaptive Optics Masking Interferometry
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چکیده
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±0.021 M⊙ and 0.064±0.032 M⊙ for the primary and secondary respectively. The inferred absolute H band magnitude of GJ 802B is MH=12.8 resulting in a model-dependent Teff of 1850 ± 50K and mass range of 0.057–0.074 M⊙.
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تاریخ انتشار 2006