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Title:
Near-Infrared Adaptive Optics Spectroscopy of Binary Brown Dwarfs HD 130948B and HD 130948C
Authors:
Goto, Miwa; Kobayashi, Naoto; Terada, Hiroshi; Gaessler, Wolfgang; Kanzawa, Tomio; Takami, Hideki; Takato, Naruhisa; Hayano, Yutaka; Kamata, Yukiko; Iye, Masanori; Saint-Jacques, D. J.; Tokunaga, A. T.; Potter, D.; Cushing, M.
Affiliation:
AA(Visiting astronomer at the Institute for Astronomy, University of Hawaii.), AB(Subaru Telescope, 650 North A`ohoku Place, Hilo, HI 96720; ), AC(Subaru Telescope, 650 North A`ohoku Place, Hilo, HI 96720; ), AD(Subaru Telescope, 650 North A`ohoku Place, Hilo, HI 96720; ), AE(Subaru Telescope, 650 North A`ohoku Place, Hilo, HI 96720; ), AF(), AG(National Astronomical Observatory of Japan, Mitaka, Tokyo 181-8588, Japan), AH(National Astronomical Observatory of Japan, Mitaka, Tokyo 181-8588, Japan), AI(National Astronomical Observatory of Japan, Mitaka, Tokyo 181-8588, Japan), AJ(National Astronomical Observatory of Japan, Mitaka, Tokyo 181-8588, Japan), AK(Départment de physique, Université de Montréal, Montréal, QC H3C 3J7, Canada), AL(Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822), AM(Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822), AN(Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822)
Publication:
The Astrophysical Journal, Volume 567, Issue 1, pp. L59-L62. (ApJL Homepage)
Publication Date:
03/2002
Origin:
UCP
ApJ Keywords:
Stars: Binaries: Close, Stars: Individual: Henry Draper Number: HD 130948, Stars: Low-Mass, Brown Dwarfs
DOI:
10.1086/339800
Bibliographic Code:
2002ApJ...567L..59G

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 130948C most likely are a binary brown dwarf system. Based on data collected at the Subaru Telescope, which is operated by the National Astronomical Observatory of Japan.
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