In-depth analysis of solar models with high-metallicity abundances and updated opacity tables

Buldgen, G.; Noels, A.; Scuflaire, R.; Amarsi, A.M.; Grevesse, N.; Eggenberger, P.; Colgan, J.; Fontes, C.J.; Baturin, V.A.; Oreshina, A.V.; Ayukov, S.V.; Hakel, P.; Kilcrease, D.P.

Авторы: Buldgen G., Noels A., Scuflaire R., Amarsi A.M., Grevesse N., Eggenberger P., Colgan J., Fontes C.J., Baturin V.A., Oreshina A.V., Ayukov S.V., Hakel P., Kilcrease D.P.
Журнал: Astronomy and Astrophysics
Том: 686
Год издания: 2024
Издательство: Springer Verlag
Местоположение издательства: Germany
Первая страница: 1
Последняя страница: 10
Номер статьи: A108
DOI: 10.1051/0004-6361/202348312
Аннотация: Context. As a result of the high-quality constraints available for the Sun, we are able to carry out detailed combined analyses usingneutrino, spectroscopic, and helioseismic observations. These studies lay the ground for future improvements of the key physicalcomponents of solar and stellar models because ingredients such as the equation of state, the radiative opacities, or the prescriptionsfor macroscopic transport processes of chemicals are then used to study other stars in the Universe.Aims. We study the existing degeneracies in solar models using the recent high-metallicity spectroscopic abundances by comparingthem to helioseismic and neutrino data and discuss the eect on their properties of changes in the micro and macro physicalingredients.Methods. We carried out a detailed study of solar models computed with a high-metallicity composition from the literature basedon averaged 3D models that were claimed to resolve the solar modelling problem. We compared these models to helioseismic andneutrino constraints.Results. The properties of the solar models are significantly aected by the use of the recent OPLIB opacity tables and the inclusionof macroscopic transport. The properties of the standard solar models computed using the OPAL opacities are similar to those forwhich the OP opacities were used.We show that a modification of the temperature gradient just below the base of the convective zoneis required to remove the discrepancies in solar models, particularly in the presence of macroscopic mixing. This can be simulated bya localised increase in the opacity of a few percent.Conclusions. We conclude that the existing degeneracies and issues in solar modelling are not removed by using an increase in thesolar metallicity, in contradiction to what has been suggested in the recent literature. Therefore, standard solar models cannot beused as an argument for a high-metallicity composition. While further work is required to improve solar models, we note that directhelioseismic inversions indicate a low metallicity in the convective envelope, in agreement with spectroscopic analyses based on full3D models.
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In-depth analysis of solar models with high-metallicity abundances and updated opacity tablesстатья

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