Mathematics – Probability
Scientific paper
Jan 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...281..561l&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 281, no. 2, p. 561-564
Mathematics
Probability
4
Atomic Structure, Dense Plasmas, Electron Scattering, Energy Absorption, Opacity, Probability Theory, Solar Interior, Stellar Models, Absorption Cross Sections, Atomic Energy Levels, Error Analysis, Heavy Elements, Mathematical Models
Scientific paper
The effects of dense plasma on radiative opacities are investigated for solar interior conditions. Atomic configuration probabilities are formulated, using the grand partition function of electrons, to include the occupation probability for interpreting pressure ionization of the atomic configuration. Also included are the effects of the screening of charged particles and the degeneracy of electrons on electron scattering and atomic absorption. The numerical calculations show that the screening effect of charged particles reduces the solar opacity by less than Delta log k = 0.027, and the effect of electron degeneracy reduces it by less than Delta log K = 0.0023. The uncertainty in the occupation probability for heavy element atoms can change the solar opacity by up to Delta log k = 0.14.
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