Astrophysics, abstract
astro-ph/0607516

From: James Lloyd [view email]

Date: Fri, 21 Jul 2006 20:48:08 GMT (108kb)

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

Authors: James P. Lloyd, Frantz Martinache, Michael J. Ireland, John D. Monnier, Steven H. Pravdo, Stuart B. Shaklan, Peter G. Tuthill

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

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$_\odot$.

http://arxiv.org/abs/astro-ph/0607516