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Doctoral thesis . 2021
Archive ouverte UNIGE
Doctoral thesis . 2021
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Transport processes in solar-type stars

Authors: Dumont, Thibaut;

Transport processes in solar-type stars

Abstract

Transport processes occurring in the radiative interior of low-mass stars are evidenced by the surface variation of light elements, as well as by the evolution of the stellar rotation rate. While there are many independent transport models, there is a lack of self-consistent theories that permit stellar evolution models to simultaneously match the observations. The aim of the PhD thesis is to explore how additional transport processes can improve the agreement between models and observations. Using the code STAREVOL, we explored several transport processes for chemicals and for angular momentum. We identified the rotational dependence of the penetrative convection as a key process. Two additional parametric turbulent mixing processes are required to simultaneously explain the observed surface Li depletion (0.8-1.2 Msol) and the solar internal rotation profile. Finally, the Li-dip (1.3-1.5 Msol), displays a different trend, and a readjustment of the prescription and parameters are needed to reproduce it.

Country
Switzerland
Related Organizations
Keywords

Stellar evolution code, Stellar physics, Transport processes, info:eu-repo/classification/ddc/520, 520, Stellar structure and evolution, ddc: ddc:520

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
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