Convective overshooting and penetration in Stars
Orateur : Daniel Lecoanet
Abstract : An important question in stellar fluid dynamics is : How does convection interact with adjacent stably-stratified layers in stars ? I will start this talk describing the structure of stars and why stars have both convective and stably-stratified regions. Convective motions can overshoot into the stably-stratified region, exciting waves and driving mixing. This mixing leads to the secularly growth of the convection zone, a process known as convective penetration. I will present a series of simulations exhibiting significant convective penetration, and present mechanistic and parametric descriptions of the phenomenon. These can be implemented in stellar evolution models, and used to compare to stellar observations.
Date et lieu : le Mardi 14/09 à 11h, Salle de séminaire IRPHE.
Le port du masque est obligatoire. Le nombre de personnes dans la salle doit être inférieur à 65% de la capacité, soit environ 50 personnes.
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