The statistical equilibrium and the 670.776- and 670.791-nm absorption lines of Li I in red-giant spectra - Methodology
Abstract
A method for calculating the statistical equilibrium for lithium in the atmospheres of red giants without LTE is analyzed. The cool-atmosphere opacity circulation method (absorption mean) is investigated. The analysis makes it possible to determine the role played by free-bound transitions from different levels in establishing the lithium ionization balance in the atmospheres of late stars.
- Publication:
-
Astronomicheskii Zhurnal
- Pub Date:
- August 1991
- Bibcode:
- 1991AZh....68..776P
- Keywords:
-
- Absorption Spectra;
- Equilibrium Equations;
- Lithium;
- Red Giant Stars;
- Stellar Atmospheres;
- Stellar Spectra;
- Line Spectra;
- Photoionization;
- Statistical Analysis;
- Stellar Evolution;
- Astrophysics