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M. Goto, N. Kobayashi, H. Terada, N. Takato, W. Gaessler (Subaru Telescope), H. Takami, Y. Hayano (National Astronomical Observatory of Japan, Mitaka), A.T. Tokunaga, D. Potter, M. Cushing (Institute for Astronomy, University of Hawaii)
We present near infrared spectroscopy of low mass companions discovered in a nearby triple system HD 130948. Spectroscopy with adaptive optics (AO) system proved a powerful technique to study close binary systems with angular separation down to 0''.12. The general spectral features of HD 130948B and C turn out very similar to each other. Based on the H2O absorption strength, as well as direct comparison with a series of template spectra we determined the spectral types of HD 130948B and C to be L3. Take young age of the primary star (500 Myr -- 1 Gyr) in account, HD 130948B and C is most likely a binary brown dwarf system.
The author(s) of this abstract have provided an email address for comments about the abstract: mgoto@naoj.org