IR spectra of the microquasar GRS 1915+105 during a low state
arXiv:astro-ph/0101391 · doi:10.1051/0004-6361:20010110
Abstract
There is controversy regarding the nature of the suspected donor star to the microquasar GRS 1915+105, and hence whether GRS 1915+105 is a high mass X-ray binary (HMXB) or a low-mass X-ray binary (LMXB). In order to clarify this issue, we obtained an infrared (J, H and K) spectrum of GRS 1915+105 in its low state which shows a steeper continuum than the prototype X-ray binary Sco X-1. We did not detect any HeII emission at 2.189 microns from GRS 1915+105 in our quiescent spectrum, indicating that the line is transient and is only observed during episodes of high X-ray activity. For our instrument configuration, there is no detection of the 12CO lines which are characteristic of late-type stars either in GRS1915+105 or Sco X-1.
7 pages, 2 figures, A&A, accepted
References in corpus (8)
- Sources of Relativistic Jets in the Galaxy
- An unstable central disk in the superluminal black-hole X-ray binary GRS 1915+105
- The variable radio emission from GRS 1915+105
- Evidence for a Disk-Jet Interaction in the Microquasar GRS 1915+105
- Evidence for Frame-Dragging Around Spinning Black Holes in X-Ray Binaries
- Rapid infrared flares in GRS 1915+105 : evidence for infrared synchrotron emission
- Oscillator Strengths and Damping Constants for Atomic Lines in the J and H Bands
- Infrared spectroscopy of low-mass X-ray binaries II