Thermal Convection in Stars and in Their Atmosphere

Thermal convection is one of the main mechanisms of heat transport and mixing in stars in general and also in the photospheric layers which emit the radiation that we observe with astronomical instruments. The present lecture notes first introduce the role of convection in astrophysics and explain t...

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Bibliographic Details
Published in:arXiv.org 2020-01
Main Author: Kupka, Friedrich
Format: Article
Language:English
Subjects:
Astronomical instruments
Astrophysics
Atmospheric models
Celestial bodies
Computer simulation
Free convection
Mathematical models
Photosphere
Stars
Online Access:Get full text
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Summary:Thermal convection is one of the main mechanisms of heat transport and mixing in stars in general and also in the photospheric layers which emit the radiation that we observe with astronomical instruments. The present lecture notes first introduce the role of convection in astrophysics and explain the basic physics of convection. This is followed by an overview on the modelling of convection. Challenges and pitfalls in numerical simulation based modelling are discussed subsequently. Finally, a particular application for the previously introduced concepts is described in more detail: the study of convective overshooting into stably stratified layers around convection zones in stars.
ISSN:2331-8422