Gallium in Hg-Mn stars
Abstract
Quantitative analyses of the Ga abundances in seven Hg-Mn stars are made with the resonance lines of Ga II and Ga III in the ultraviolet region observed with the IUE. The Ga overabundance is confirmed and can be regarded as a genuine anomaly in Hg-Mn stars. The Ga overabundance shows a dependence on the stellar effective temperature. The ionization equilibrium between Ga II and Ga III is well realized in the cooler stars, while not in the hotter stars.
- Publication:
-
Liege International Astrophysical Colloquia
- Pub Date:
- 1981
- Bibcode:
- 1981LIACo..23..163T
- Keywords:
-
- Abundance;
- Gallium;
- Metallic Stars;
- Ultraviolet Astronomy;
- Anomalies;
- Atmospheric Models;
- Iue;
- Line Spectra;
- Stellar Temperature;
- Astrophysics