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Olivier Richard

Atomic diffusion across the HR diagram

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Mots-clés : diffusion atomique, étoiles, abondances, évolution, rotation

Abstract

It is clear that in order to explain many observed stellar phenomena, atomic diffusion must be included in stellar models. The effects of atomic diffusion are not limited to the surface abundances as we will see, it occurs in stars from the surface to the center and even if these effects are reduced in the external layers by other transport processes it remains in the center. We will also see that the induced chemical stratification has a strong impact on the stellar opacity.

Keywords : atomic diffusion, star, abundances, evolution, interiors

To cite this article

Olivier Richard, «Atomic diffusion across the HR diagram», Bulletin de la Société Royale des Sciences de Liège [En ligne], Volume 88 - Année 2019, Actes de colloques, How Much to we Trust Stellar Models ? - September 2018 - Liège, Belgium, 44 - 49 URL : https://popups.uliege.be:443/0037-9565/index.php?id=9254.

About: Olivier Richard

Laboratoire Univers et Particules de Montpellier, Université de Montpellier, CNRS, place Eugène Bataillon, 34095 Montpellier, France.