Spectroscopic studies of Wolf-rayet stars with absorption lines. III.New orbits for HD 186943 (WN4) and HD 211853 (WN6).
Abstract
Two W-R binaries are reexamined using coude spectroscopy. The new orbit solution for HD 186943 suggests that the minimum mass of the WN4 star is 9-11 solar masses. The companion appears to be approximately of the type O9 V and is about 1.3 mag brighter than the WN4 star. The minimum mass for the O star indicates that the system should eclipse. Analyzing current data and previous studies, it is shown that HD 211853 is actually a quadruple system that consists of a widely spaced pair of close binaries of types WN6 plus O and O plus O.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- February 1981
- DOI:
- 10.1086/158693
- Bibcode:
- 1981ApJ...244..157M
- Keywords:
-
- Absorption Spectra;
- Eclipsing Binary Stars;
- Hot Stars;
- Stellar Mass;
- Stellar Spectra;
- Stellar Spectrophotometry;
- Wolf-Rayet Stars;
- Eccentricity;
- Emission Spectra;
- Line Spectra;
- O Stars;
- Orbital Elements;
- Stellar Luminosity;
- Stellar Motions;
- Astronomy