A radial velocity study of emission in Stepanyan's star.
Abstract
Emission lines in the region 4045-4945 A are observed for nearly two complete orbits of Stepanyan's star. Three eclipses of the system are observed at 2.5 A spectral and 100 second time resolution. The spectral region 6800-9200 A is observed for one complete orbit at 10 A resolution. No absorption lines or bands from a red dwarf are observed, even at mid-eclipse. Absorption lines of O I are seen in the infrared, which are strongest at phases 0.4-0.5 and are invisible at mid-eclipse.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- February 1981
- DOI:
- 10.1086/158703
- Bibcode:
- 1981ApJ...244..259Y
- Keywords:
-
- Dwarf Stars;
- Eclipsing Binary Stars;
- Emission Spectra;
- Radial Velocity;
- Stellar Mass Accretion;
- Stellar Spectra;
- Absorption Spectra;
- Balmer Series;
- Infrared Spectra;
- Light Curve;
- Magnetohydrodynamic Waves;
- Numerical Analysis;
- Oxygen;
- Stellar Mass;
- Variable Stars;
- Astronomy