UMR 5672

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Convective boundary mixing in stars

Isabelle Baraffe (University of Exeter)
When Feb 11, 2019
from 11:00 AM to 12:00 PM
Where Amphi. Schrödinger
Attendees Isabelle Baraffe
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I will discuss the process of convective boundary mixing in stars, a key process which drives chemical mixing and transport of angular momentum in stellar interiors. Our study is based on numerical simulations using a new multi-dimensional, fully compressible hydrodynamical time implicit code MUSIC. I will discuss the main challenges in the computation of multi-dimensional stellar structures and some of the advantages of our approach with MUSIC for the study of stellar fluid dynamics problems. We propose that intermittent convective mixing at the convective boundary in a star can be modeled using extreme value theory, a statistical method frequently used in finance, meteorology, or environmental science. I will discuss the potential of statistical methods for the interpretation of complex numerical simulations in a stellar interior context.

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