The Equation of State for Stellar Envelopes. IV. Thermodynamic Quantities and Selected Ionization Fractions for Six Elemental Mixes
Abstract
The free-energy minimization technique in the form developed in the preceding papers in this series is employed to evaluate thermodynamic quantities and ionization fractions on a fine temperature and density grid for six astrophysical mixtures of 15 elements. The mixtures range from that appropriate to super-metal-rich stars, through solar abundance, to that for extreme Population II objects. In this paper, the results for solar abundances are summarized in a form that is illustrative and which facilitates comparison with the results from other equation of state calculations.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- February 1990
- DOI:
- 10.1086/168383
- Bibcode:
- 1990ApJ...350..300M
- Keywords:
-
- Equations Of State;
- Gas Ionization;
- Metallic Stars;
- Stellar Envelopes;
- Thermodynamics;
- Helium Ions;
- Hydrogen Ions;
- Temperature Dependence;
- Astrophysics;
- ATOMIC PROCESSES;
- EQUATION OF STATE;
- STARS: ATMOSPHERES