Duplicity in the solar neighborhood. II. Spectroscopic orbits for four bright stars HD 21018, HD 30021, HD 158837 and HD 190658.
Abstract
Orbital elements have been determined for four stars from the bright star catalog; HD 21018, HD 30021, HD 158837, and HD 190658. The rotation of these stars has been determined, and HD 21018 is shown to be a giant in rapid non-synchronous rotation. HD 190658 is an M2III giant which could fill its Roche lobe and eventually show eclipses. HD 190658 is also a high velocity star (-112.1 km/s) and has the peculiarity of having the shortest period (198 days) of any binary of type M III. It should also be noted that these stars are all members of triple systems.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- January 1982
- Bibcode:
- 1982A&A...105..318L
- Keywords:
-
- Binary Stars;
- Orbital Elements;
- Radial Velocity;
- Stellar Luminosity;
- Stellar Rotation;
- Stellar Spectrophotometry;
- Giant Stars;
- M Stars;
- Roche Limit;
- Solar System;
- Astronomy