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Title: Seismic inversion of the solar entropy: setting a cat among the pigeons

Abstract

The Sun is the most constrained and well-studied of all stars. As a consequence, the physical ingredients entering solar models are used as a reference to study all other stars observed in the Universe. However, our understanding of the solar structure is still imperfect, as illustrated by the current debate on the heavy element abundances in the Sun. Aims. We wish to provide additional information on the solar structure by carrying out structural inversions of a new physical quantity, a proxy of the entropy of the solar plasma which properties are very sensitive to the temperature gradient below the convective zone. Methods. We use new structural kernels to carry out direct inversions of an entropy proxy of the solar plasma and compare the solar structure to various standard solar models built using various opacity tables and chemical abundances. We also link our results to classical tests commonly found in the literature. Results. Our analysis allows us to probe more efficiently the uncertain regions of the solar models, just below the convective zone, paving the way for new in-depth analyses of the Sun taking into account additional physical uncertainties of solar models beyond the specific question of chemical abundances.

Authors:
 [1];  [1];  [1];  [1];  [2];  [1]; ORCiD logo [3]; ORCiD logo [3];  [4]; ORCiD logo [3]; ORCiD logo [3];  [5]
  1. Univ. de Liege, Liege (Belgium). Inst. d'Astrophysique et Geophysique
  2. Univ. Paris Diderot, Paris (France). Lab. of Space Studies and Instrumentation in Astrophysics (LESIA)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  4. Univ. de Geneve, Sauverny (France). Observatoire de Geneeve
  5. Univ. Paris Diderot, Paris (France). Lab. AIM
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1460645
Report Number(s):
LA-UR-17-21463
Journal ID: ISSN 0004-6361; TRN: US1901885
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Accepted Manuscript
Journal Name:
Astronomy and Astrophysics
Additional Journal Information:
Journal Volume: 607; Journal ID: ISSN 0004-6361
Publisher:
EDP Sciences
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; Sun: helioseismology; Sun: oscillations; Sun: fundamental parameters

Citation Formats

Buldgen, Gael, Salmon, Sebastien, Noels, A., Scuflaire, R., Reese, D. R., Dupret, M-A., Colgan, James Patrick, Fontes, Christopher John, Eggenberger, Patrick, Hakel, Peter, Kilcrease, David Parker, and Turck-Chieze, Sylvaine. Seismic inversion of the solar entropy: setting a cat among the pigeons. United States: N. p., 2017. Web. doi:10.1051/0004-6361/201731354.
Buldgen, Gael, Salmon, Sebastien, Noels, A., Scuflaire, R., Reese, D. R., Dupret, M-A., Colgan, James Patrick, Fontes, Christopher John, Eggenberger, Patrick, Hakel, Peter, Kilcrease, David Parker, & Turck-Chieze, Sylvaine. Seismic inversion of the solar entropy: setting a cat among the pigeons. United States. doi:10.1051/0004-6361/201731354.
Buldgen, Gael, Salmon, Sebastien, Noels, A., Scuflaire, R., Reese, D. R., Dupret, M-A., Colgan, James Patrick, Fontes, Christopher John, Eggenberger, Patrick, Hakel, Peter, Kilcrease, David Parker, and Turck-Chieze, Sylvaine. Wed . "Seismic inversion of the solar entropy: setting a cat among the pigeons". United States. doi:10.1051/0004-6361/201731354. https://www.osti.gov/servlets/purl/1460645.
@article{osti_1460645,
title = {Seismic inversion of the solar entropy: setting a cat among the pigeons},
author = {Buldgen, Gael and Salmon, Sebastien and Noels, A. and Scuflaire, R. and Reese, D. R. and Dupret, M-A. and Colgan, James Patrick and Fontes, Christopher John and Eggenberger, Patrick and Hakel, Peter and Kilcrease, David Parker and Turck-Chieze, Sylvaine},
abstractNote = {The Sun is the most constrained and well-studied of all stars. As a consequence, the physical ingredients entering solar models are used as a reference to study all other stars observed in the Universe. However, our understanding of the solar structure is still imperfect, as illustrated by the current debate on the heavy element abundances in the Sun. Aims. We wish to provide additional information on the solar structure by carrying out structural inversions of a new physical quantity, a proxy of the entropy of the solar plasma which properties are very sensitive to the temperature gradient below the convective zone. Methods. We use new structural kernels to carry out direct inversions of an entropy proxy of the solar plasma and compare the solar structure to various standard solar models built using various opacity tables and chemical abundances. We also link our results to classical tests commonly found in the literature. Results. Our analysis allows us to probe more efficiently the uncertain regions of the solar models, just below the convective zone, paving the way for new in-depth analyses of the Sun taking into account additional physical uncertainties of solar models beyond the specific question of chemical abundances.},
doi = {10.1051/0004-6361/201731354},
journal = {Astronomy and Astrophysics},
number = ,
volume = 607,
place = {United States},
year = {2017},
month = {11}
}

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Cited by: 5 works
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    Works referencing / citing this record:

    Progress in Global Helioseismology: A New Light on the Solar Modeling Problem and Its Implications for Solar-Like Stars
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    • Buldgen, Gaël; Salmon, Sébastien; Noels, Arlette
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