Helioseismic inference of the solar radiative opacity
Abstract The Sun is the most studied of all stars, and thus constitutes a benchmark for stellar models. However, our vision of the Sun is still incomplete, as illustrated by the current debate on its chemical composition. The problem reaches far beyond chemical abundances and is intimately linked to...
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Nature Portfolio
2025-01-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-024-54793-y |
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| author | Gaël Buldgen Jean-Christophe Pain Philippe Cossé Christophe Blancard Franck Gilleron Anil K. Pradhan Christopher J. Fontes James Colgan Arlette Noels Jørgen Christensen-Dalsgaard Morgan Deal Sergey V. Ayukov Vladimir A. Baturin Anna V. Oreshina Richard Scuflaire Charly Pinçon Yveline Lebreton Thierry Corbard Patrick Eggenberger Peter Hakel David P. Kilcrease |
| author_facet | Gaël Buldgen Jean-Christophe Pain Philippe Cossé Christophe Blancard Franck Gilleron Anil K. Pradhan Christopher J. Fontes James Colgan Arlette Noels Jørgen Christensen-Dalsgaard Morgan Deal Sergey V. Ayukov Vladimir A. Baturin Anna V. Oreshina Richard Scuflaire Charly Pinçon Yveline Lebreton Thierry Corbard Patrick Eggenberger Peter Hakel David P. Kilcrease |
| author_sort | Gaël Buldgen |
| collection | DOAJ |
| description | Abstract The Sun is the most studied of all stars, and thus constitutes a benchmark for stellar models. However, our vision of the Sun is still incomplete, as illustrated by the current debate on its chemical composition. The problem reaches far beyond chemical abundances and is intimately linked to microscopic and macroscopic physical ingredients of solar models such as radiative opacity, for which experimental results have been recently measured that still await theoretical explanations. We present opacity profiles derived from helioseismic inferences and compare them with detailed theoretical computations of individual element contributions using three different opacity computation codes, in a complementary way to experimental results. We find that our seismic opacity is about 10% higher than theoretical values used in current solar models around 2 million degrees, but lower by 35% than some recent available theoretical values. Using the Sun as a laboratory of fundamental physics, we show that quantitative comparisons between various opacity tables are required to understand the origin of the discrepancies between reported helioseismic, theoretical and experimental opacity values. |
| format | Article |
| id | doaj-art-40c5b42a06b0471da845dbedb42f5788 |
| institution | Kabale University |
| issn | 2041-1723 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj-art-40c5b42a06b0471da845dbedb42f57882025-02-02T12:32:40ZengNature PortfolioNature Communications2041-17232025-01-0116111410.1038/s41467-024-54793-yHelioseismic inference of the solar radiative opacityGaël Buldgen0Jean-Christophe Pain1Philippe Cossé2Christophe Blancard3Franck Gilleron4Anil K. Pradhan5Christopher J. Fontes6James Colgan7Arlette Noels8Jørgen Christensen-Dalsgaard9Morgan Deal10Sergey V. Ayukov11Vladimir A. Baturin12Anna V. Oreshina13Richard Scuflaire14Charly Pinçon15Yveline Lebreton16Thierry Corbard17Patrick Eggenberger18Peter Hakel19David P. Kilcrease20STAR Institute, Université de LiègeCEA, DAM, DIFCEA, DAM, DIFCEA, DAM, DIFCEA, DAM, DIFOhio State University, Dept. AstronomyLos Alamos National LaboratoryLos Alamos National LaboratoryDépartement d’Astronomie, Université de GenèveStellar Astrophysics Centre and Department of Physics and Astronomy, Aarhus UniversityLUPM, Université de Montpellier, CNRS, Place Eugène BataillonSternberg Astronomical Institute, Lomonosov Moscow State UniversitySternberg Astronomical Institute, Lomonosov Moscow State UniversitySternberg Astronomical Institute, Lomonosov Moscow State UniversitySTAR Institute, Université de LiègeUniversité Paris-Saclay, Institut dÁstrophysique Spatiale, UMR 8617, CNRSLESIA, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, Université Paris CitéUniversité Côte d’Azur, Observatoire de la Côte d’Azur, CNRS, Laboratoire LagrangeDépartement d’Astronomie, Université de GenèveLos Alamos National LaboratoryLos Alamos National LaboratoryAbstract The Sun is the most studied of all stars, and thus constitutes a benchmark for stellar models. However, our vision of the Sun is still incomplete, as illustrated by the current debate on its chemical composition. The problem reaches far beyond chemical abundances and is intimately linked to microscopic and macroscopic physical ingredients of solar models such as radiative opacity, for which experimental results have been recently measured that still await theoretical explanations. We present opacity profiles derived from helioseismic inferences and compare them with detailed theoretical computations of individual element contributions using three different opacity computation codes, in a complementary way to experimental results. We find that our seismic opacity is about 10% higher than theoretical values used in current solar models around 2 million degrees, but lower by 35% than some recent available theoretical values. Using the Sun as a laboratory of fundamental physics, we show that quantitative comparisons between various opacity tables are required to understand the origin of the discrepancies between reported helioseismic, theoretical and experimental opacity values.https://doi.org/10.1038/s41467-024-54793-y |
| spellingShingle | Gaël Buldgen Jean-Christophe Pain Philippe Cossé Christophe Blancard Franck Gilleron Anil K. Pradhan Christopher J. Fontes James Colgan Arlette Noels Jørgen Christensen-Dalsgaard Morgan Deal Sergey V. Ayukov Vladimir A. Baturin Anna V. Oreshina Richard Scuflaire Charly Pinçon Yveline Lebreton Thierry Corbard Patrick Eggenberger Peter Hakel David P. Kilcrease Helioseismic inference of the solar radiative opacity Nature Communications |
| title | Helioseismic inference of the solar radiative opacity |
| title_full | Helioseismic inference of the solar radiative opacity |
| title_fullStr | Helioseismic inference of the solar radiative opacity |
| title_full_unstemmed | Helioseismic inference of the solar radiative opacity |
| title_short | Helioseismic inference of the solar radiative opacity |
| title_sort | helioseismic inference of the solar radiative opacity |
| url | https://doi.org/10.1038/s41467-024-54793-y |
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