Published January 27, 2025
| Version v1
Journal article
Helioseismic inference of the solar radiative opacity
Creators
- Buldgen, Gaël
- Pain, Jean-Christophe
- Cossé, Philippe
- Blancard, Christophe
- Gilleron, Franck
- K. Pradhan, Anil
- J. Fontes, Christopher
- Colgan, James
- Noels, Arlette
- Christensen-Dalsgaard, Jørgen
- Deal, Morgan
- V. Ayukov, Sergey
- A. Baturin, Vladimir
- V. Oreshina, Anna
- Scuflaire, Richard
- Pinçon, Charly
- Lebreton, Y.
- Corbard, Thierry
- Eggenberger, Patrick
- Hakel, Peter
- P. Kilcrease, David
Contributors
Others:
- Space Sciences, Technologies and Astrophysics Research Institute (STAR) ; Université de Liège
- Département d'astronomie ; Université de Genève = University of Geneva (UNIGE)
- CEA/DAM [Arpajon] (CEA/DAM) ; Direction des Applications Militaires (DAM) ; Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)
- Laboratoire Matière sous Conditions Extrêmes (LMCE) ; DAM Île-de-France (DAM/DIF) ; Direction des Applications Militaires (DAM) ; Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction des Applications Militaires (DAM) ; Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay
- Dept. of Astronomy ; The Ohio State University [Columbus] (OSU)
- Los Alamos National Laboratory (LANL)
- Département des Sciences et Gestion de l'Environnement/Océanologie [Liège] ; Université de Liège
- Stellar Astrophysics Centre [Aarhus] (SAC) ; Aarhus University [Aarhus]
- Department of Physics and Astronomy [Aarhus] ; Aarhus University [Aarhus]
- Laboratoire Univers et Particules de Montpellier (LUPM) ; Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)
- Centro de Astrofísica da Universidade do Porto (CAUP) ; Universidade do Porto = University of Porto
- Sternberg Astronomical Institute [Moscow] ; Lomonosov Moscow State University = Université d'État Lomonossov de Moscou [Moscou] (MSU)
- Lomonosov Moscow State University = Université d'État Lomonossov de Moscou [Moscou] (MSU)
- Institut d'astrophysique spatiale (IAS) ; Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National d'Études Spatiales [Paris] (CNES)
- Université Paris-Saclay
- Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics (LESIA) ; Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris ; Centre National de la Recherche Scientifique (CNRS)-Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Sciences et Lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)
- Institut de Physique de Rennes (IPR) ; Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS)
- Joseph Louis LAGRANGE (LAGRANGE) ; Université Nice Sophia Antipolis (1965 - 2019) (UNS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur ; Université Côte d'Azur (UniCA)-Université Côte d'Azur (UniCA)-Centre National de la Recherche Scientifique (CNRS)
- Université Côte d'Azur (UniCA)
- Observatoire de la Côte d'Azur ; Université Côte d'Azur (UniCA)
- Observatoire Astronomique de l'Université de Genève (ObsGE) ; Université de Genève = University of Geneva (UNIGE)
Description
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.
Abstract
International audienceAdditional details
Identifiers
- URL
- https://cnrs.hal.science/hal-04915685
- URN
- urn:oai:HAL:hal-04915685v1
Origin repository
- Origin repository
- UNICA