Influences of Coulomb coupling effects to solar-like stellar models

Details Influences of Coulomb coupling effects to solar-like stellar models Influences of Coulomb coupling effects to solar-like stellar models

Aug 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003acasn..44..256z&link_type=abstract

Acta Astronomica Sinica, vol. 44, no. 3, p. 256-269

Physics

Stellar Physics, Equation Of State, Non-Ideal Effects, Coulomb Coupling Interactions

Scientific paper

As one of the most important physical equation in the study of astrophysics, especially that of stellar modeling theory, equation of state with ideal effects only cannot meet such high-quality circumstances as helioseismology researches, and more precise one with non-ideal effects is in great need to describe the system much more detailed and complete. For a weakly coupled and weakly degenerated plasma system, the Coulomb interactions between charged particles are treated respectively from the so-called chemical picture as: The ion-electron interactions are described by the extended Debye-Hückel theory with hard-core corrections, ion-ion interactions are treated by N-body theory of classical point particles, and electron-electron interactions are described by quantum statistics methods. All the above effects are proposed mathematically by a set of semi-analytic formula to describe their influences to the total free energy. For helioseismological studies, a group of solar-like star models are chosen out to be studied and be calculated. Results of comparisons and analyses for all the three forms of Coulomb interactions are given out, and discussions and verifications are finally made according to such theoretical corrections.

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