Dynamo theory
Raphaël Raynaud
1. Description
Magnetic fields are observed in various astrophysical objects like galaxies, stars and planets that, quoting Keith Moffatt (1978), “it is probably safe to state that a magnetic field is a normal accompaniment of any cosmic body that is both fluid (wholly or in part) and rotating”. It is currently believed that most cosmic magnetic fields that we observe have been, and still are, continuously created by an electromagnetic inductive process known as the dynamo effect. This course is intended to be an introduction to the dynamo theory with a particular focus on direct numerical simulations, leading up to present-day research questions.
2. Prerequisites
Students are assumed to have basic knowledge in vector analysis, linear algebra, elementary theory of differential equations, complex variables and elements of fluid mechanics and electrodynamics (Maxwell’s equations). Programming notions with the Python language may be useful. Note that the course will be in English.
3. Organization
This is intended to be a lecture course, but short oral presentations (in English) are envisaged. Depending of the computing facilities, hands-on sessions with the 3D MHD spherical shell code MagIC can be organized. If not, data set can be provided to learn basic post-processing tasks.