Solar Mixture Opacity Calculations Using Detailed Configuration and Level Accounting Treatments

Details Solar Mixture Opacity Calculations Using Detailed Configuration and Level Accounting Treatments Solar Mixture Opacity Calculations Using Detailed Configuration and Level Accounting Treatments

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012apj...745...10b&link_type=abstract

The Astrophysical Journal, Volume 745, Issue 1, article id. 10 (2012).

Astronomy and Astrophysics

Astronomy

1

Atomic Processes, Plasmas, Sun: Interior

Scientific paper

An opacity model (OPAS) combining detailed configuration and level accounting treatments has been developed to calculate radiative opacity of plasmas in local thermodynamic equilibrium. The model is presented and used to compute spectral opacities of a solar mixture. Various density-temperature couples have been considered from the solar center up to the vicinity of the radiative/convective zone interface. For a given solar thermodynamic path, OPAS calculations are compared to Opacity Project (OP) and OPAL data. Rosseland mean opacity values are in very good agreement over all the considered solar thermodynamic path, while OPAS and OP spectral opacities of each element may vary considerably. Main sources of discrepancy are discussed.

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