Publications
of the
MPIfR
Optical & Infrared
Interferometry Group
W. Stolzmann and T. Blöcker:
The Effects of Exchange and Correlation for
Astrophysical Quantities
Proceedings of the conference on Strongly
Coupled Coulomb Systems,
G.J. Kalman, K.B. Blagoev and J.M. Rommel (eds.), Plenum Press, New
York, p. 273-278 (1998)
Abstract.
For astrophysical applications, e.g. stellar evolution or
astroseismological investigations, it is necessary to determine
a set of thermodynamical functions over a wide range of densities
and temperatures. This concerns the pressure (i.e. the
equation of state), the internal energy, the isothermal
compressibility (or the density exponent, resp.),
the generalized Grüneisen coefficient (or the temperature exponent,
resp.) and the isochoric specific heat
(or the isobaric specific heat, resp.).
We present for some of these quantities and further relevant
parameters for astrophysical applications, as, e.g., the adiabatic
gradient, a semirelativistically analytical
description being valid for T < 2 x 10^9 K and any density.
Nonideal effects due to the correlations between electrons and
z-charged ions are included by Pade Approximants which cover a
wide range of degeneracy and Coulomb coupling.
Numerical studies and comparisons are given for fully ionized plasmas
consisting of light (He) and heavy (C) elements, respectively.
You can get this publication ...