Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aas...193.9801r&link_type=abstract
American Astronomical Society, 193rd AAS Meeting, #98.01; Bulletin of the American Astronomical Society, Vol. 30, p.1393
Astronomy and Astrophysics
Astronomy
Scientific paper
We have used an activity expansion method, based on a many-body expansion of the grand canonical partition function, to calculate the equation of state of steller material. The method considers from the outset electrons and nuclei, so that plasma effects on bound states arises naturally from the theory. The activity expansion method avoids many of the ad-hoc approximations used in the usual free energy minimization approaches. Rogers, Swenson and Iglesias (1996, ApJ, 456) used an earlier version of this work to calculate the equation of state tables for stars having mass greater than 0.8 M0. In the present work we have extended the OPAL tables to include stars with masses greater than 0.3 M0. We now include relativity in the free electron degeneracy and exchange terms. We also use better estimates for the molecular partition functions and the effects of molecular interaction.
Nayfonov Alan
Rogers Forrest J.
No associations
LandOfFree
OPAL Equation of State for Low Mass Stars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with OPAL Equation of State for Low Mass Stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and OPAL Equation of State for Low Mass Stars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-997403