Near-Infrared Adaptive Optics Spectroscopy of Binary Brown Dwarf HD 130948B and C
M. Goto, N. Kobayashi, H. Terada, W. Gaessler, T. Kanzawa, H. Takami, N. Takato, Y. Hayano, Y. Kamata, M. Iye, D. J. Saint-Jacques, A. T. Tokunaga
Abstract
We present near-infrared spectroscopy of low-mass companions in a nearby triple system HD 130948 (Gliese 564, HR 5534). Adaptive optics on the Subaru Telescope allowed spectroscopy of the individual components of the 0".13 binary system. Based on a direct comparison with a series of template spectra, we determined the spectral types of HD 130948B and C to be L4 +- 1. If we take the young age of the primary star into account (0.3-0.8 Gyr), HD 130948B and C most likely are a binary brown dwarf system.
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