The internal rotation of the Sun and its link to the solar Li and He surface abundances

[en] The Sun serves as a natural reference for the modelling of the various physical processes at work in stellar interiors. Helioseismology results, which inform us on the characterization of the interior of the Sun (such as, for example, the helium abundance in its envelope), are, however, at odds with heavy element abundances. Moreover, the solar internal rotation and surface abundance of lithium have always been challenging to explain. We present results of solar models that account for transport of angular momentum and chemicals by both hydrodynamic and magnetic instabilities. We show that these transport processes reconcile the internal rotation of the Sun, its surface lithium abundance, and the helioseismic determination of the envelope helium abundance. We also show that the efficiency of the transport of chemicals required to account for the solar surface lithium abundance also predicts the correct value of helium, independently from a specific transport process. © 2022, The Author(s), under exclusive licence to Springer Nature Limited.

Research Center/Unit :

STAR - Space sciences, Technologies and Astrophysics Research - ULiège

Disciplines :

Space science, astronomy & astrophysics

Author, co-author :

Eggenberger, P.; Département d’Astronomie, Université de Genève, Versoix, Switzerland

Buldgen, Gaël ; Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO) > Astrophysique stellaire théorique et astérosismologie ; Département d’Astronomie, Université de Genève, Versoix, Switzerland

Salmon, Sébastien ; Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO) > Astrophysique stellaire théorique et astérosismologie ; Département d’Astronomie, Université de Genève, Versoix, Switzerland

Grötsch-Noels, Arlette ; Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO)

Grevesse, Nicolas ; Université de Liège - ULiège > Centres généraux > CSL (Centre Spatial de Liège)

Asplund, M.; Australian Academy of Science, Canberra, ACT, Australia

Language :

English

Title :

The internal rotation of the Sun and its link to the solar Li and He surface abundances

Publication date :

2022

Journal title :

Nature Astronomy

eISSN :

2397-3366

Publisher :

Nature Research

Volume :

Issue :

Pages :

788 - 795

Peer reviewed :

Peer Reviewed verified by ORBi

Funding text :

We thank T. Dumont and C. Charbonnel for providing us with their compilation of observations of lithium and beryllium abundances available for solar-type stars. P.E. and S.J.A.J.S. have received funding from the European Research Council under the European Union's Horizon 2020 research and innovation programme (grant agreement No 833925, project STAREX). G.B. acknowledges fundings from the SNF AMBIZIONE grant No 185805 (Seismic inversions and modelling of transport processes in stars).

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since 23 December 2022

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