An improved equation of state under solar interior conditions

Details An improved equation of state under solar interior conditions An improved equation of state under solar interior conditions

Dec 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000a%26a...364..879b&link_type=abstract

Astronomy and Astrophysics, v.364, p.879-886 (2000)

Astronomy and Astrophysics

Astrophysics

3

Equation Of State, Sun: Interior, Stars: Interiors

Scientific paper

This paper presents a simple and efficient equation of state which can be used for quick and accurate computing of the thermodynamic functions of partly ionized and weakly coupled plasmas. Based on the free energy minimization method, the improvement of the equation of state includes a detailed account of the physical processes of non-ideal effects consisting of electron degeneracy, Coulomb coupling and pressure ionization. The treatment of Coulomb coupling combines the results of the quantum exchange effect of degenerate electrons at finite temperature, N-body semi-analytic theory and the extended Debye-Hückel theory with hard-sphere correction. For the complicated physical processes of pressure ionization an approximate model is adopted. The nonideal corrections to equation of state are calculated under solar interior conditions.

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