Optical and X-ray observations of 2S 0921-630.
Abstract
The present investigation is concerned with photometric and spectroscopic measurements of 2S 0921-630 covering the years 1975-82. The X-ray source 2S 0921-630 was discovered by Li et al. (1978) and identified with an approximately 17th magnitude star showing He II 4686 A and H-beta in emission. Attention is given to photoelectric photometry, photographic photometry, aspects of periodic behavior, spectroscopy, radial velocity measurements and equivalent widths, and X-ray observations. It is found that the radial velocity data confirm the 9-day period previously suggested for the system and exclude alternative periods of 17.9 and 7.7 days.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- October 1983
- DOI:
- 10.1093/mnras/205.2.403
- Bibcode:
- 1983MNRAS.205..403B
- Keywords:
-
- Eclipsing Binary Stars;
- Light Curve;
- Radial Velocity;
- Stellar Motions;
- Stellar Spectrophotometry;
- X Ray Sources;
- Astronomical Photography;
- Orbital Elements;
- Spectral Line Width;
- Stellar Models;
- Ubv Spectra;
- X Ray Spectra;
- Astrophysics