On density-dependent and temperature-dependent ground-state and continuum effects in the equation of state for stellar interiors
The consequence of shifts in bound-state energies are examined, as well as the position of the continuum for thermodynamic quantities. Two independent methods from different branches of physics are brought together. A simple free-energy model is used to examine the thermodynamic consequences of the results of quantum statistical calculations of two-particle properties in a plasma using the Green's function technique. A comparison with data inferred from helioseismology shows that this interdisciplinary procedure works very well for lower level approximations, such as the static screening in the effective two-particle wave equation. However, in the case of dynamic screening in the wave equation, the resulting thermodynamic quantities are inconsistent with observations. This could result from the inability of this method to compute the thermodynamic quantities or from the inappropriate treatment of the ion contribution to the electronic self-energy corresponding to the dielectric function used in random phase approximation. In any case, the results demonstrate the power of helioseismology to test models of basic plasma physics.
Bibliographic Reference: Article: The Astrophysical Journal, Vol. 498 (1998) pp. 349-359
Record Number: 199810990 / Last updated on: 1998-09-15
Original language: en
Available languages: en