Identification of the donor in the X-ray binary GRS 1915+105

Details Identification of the donor in the X-ray binary GRS 1915+105 Identification of the donor in the X-ray binary GRS 1915+105

2001-05-26

arxiv.org/abs/astro-ph/0105467v1

Astronomy and Astrophysics

Astrophysics

5 pages, 3 figures, to appear as A&A Lett

Scientific paper

10.1051/0004-6361:20010771

We report on the results of medium-resolution spectroscopy of GRS 1915+105 in the near-infrared H and K band using the 8m VLT at ESO. We clearly identify absorption bandheads from 12CO and 13CO. Together with other features this results in a classification of the mass-donating star in this binary as a K-M III star, clearly indicating that GRS 1915+105 belongs to the class of low-mass X-ray binaries (LMXB).

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