Line blanketing in the Lyman-alpha wings
Abstract
A schematic study of the formation of lines in the Lyman-alpha wings in A and late B stars is presented. It is demonstrated that lines situated in the Lyman-alpha wings have very complex profiles, and in several cases they can appear strongly in emission. fitting the observed fluxes to those predicted by the model atmosphere calculation of Kurucz (1979). This emission tends to increase with increasing abundance and with decreasing distance from the Lyman-alpha center. It is tentatively suggested that this effect can explain the anomalous brightness variations in the Lyman-alpha wings of alpha-2 CVn and similar stars.
- Publication:
-
Liege International Astrophysical Colloquia
- Pub Date:
- 1981
- Bibcode:
- 1981LIACo..23..373H
- Keywords:
-
- A Stars;
- B Stars;
- Lyman Alpha Radiation;
- Peculiar Stars;
- Stellar Spectra;
- Brightness;
- Emission Spectra;
- Late Stars;
- Line Spectra;
- Stellar Atmospheres;
- Stellar Radiation;
- Astrophysics