Detailed Opacity Calculations for Stellar Models

TL;DR

This paper discusses detailed opacity calculations crucial for stellar modeling, describing the SCO-RCG code and OPAMCDF project, and presenting experimental interpretations relevant to astrophysics and solar conditions.

Contribution

It introduces advanced opacity codes and their application to interpret laboratory experiments and stellar phenomena, enhancing the accuracy of stellar models.

Findings

Successful interpretation of laser and Z pinch experiments

Application of opacity codes to solar interior conditions

Improved understanding of stellar pulsation mechanisms

Abstract

Radiative opacity is an important quantity in the modeling of stellar structure and evolution. In the present work we recall the role of opacity in the interpretation of pulsations of different kinds of stars. The detailed opacity code SCO-RCG for local-thermodynamic-equilibrium (LTE) plasmas is described, as well as the OPAMCDF project dedicated to the spectroscopy of LTE and non-LTE plasmas. Interpretations, with the latter codes, of several laser and Z pinch experiments in conditions relevant to astrophysical applications are also presented and our work in progress as concerns the internal solar conditions is illustrated.