DOE OSTI · 2545114
Modelling Thomson Scattering in a Hydrogen Plasma at Stellar Interior Conditions Using the Hypernetted‐Chain Approach
Abstract
Under the extreme conditions found in small stars, where electron degeneracy and Coulomb coupling are significant, accurate modeling of Thomson scattering is crucial for determining opacity, a primary quantity for stellar energy transport. We use hypernetted-chain calculations, incorporating quantum pseudopotentials and electron-exchange effects to obtain the electron–electron static structure factor to calculate the Thomson scattering transport cross-section for conditions prevailing in the interior of small stars. These results are compared to those from average-atom simulations and analytical calculations. Our findings support laboratory astrophysics experiments aimed at benchmarking opacity models for stellar interiors, particularly for red dwarf stars, and help to bridge theoretical models with observations.
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Schumacher, Samuel [University of Rostock (Germany)], Lütgert, Julian [University of Rostock (Germany)], Gericke, Dirk O. [University of Warwick, Coventry (United Kingdom)], Bethkenhagen, Mandy [École Polytechnique—Institut Polytechnique de Paris (France)], Döppner, Tilo [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)], Landen, Otto L. [Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)], Shaffer, Nathaniel R. [University of Rochester, NY (United States)] (ORCID:0000000207100026), Starrett, Charles E. [Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)], Kraus, Dominik [University of Rostock (Germany)]. 2025-03-31. Modelling Thomson Scattering in a Hydrogen Plasma at Stellar Interior Conditions Using the Hypernetted‐Chain Approach. https://doi.org/10.1002/ctpp.70002
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