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Astrophysics: Solar Magnetic Fields and Dynamo Theory
This lecture delves into the structure and dynamics of solar magnetic fields, exploring topics such as the origin of cosmic magnetic fields, dynamo theory, and the role of turbulence in magnetic field amplification. The instructor discusses the solar cycle, sunspots, and the generation of magnetic fields through dynamo processes. Various theorems related to kinematic dynamo theory are presented, along with insights into solar rotation and helioseismology. The lecture also covers the magnetic Reynolds number in the Sun, meridional circulation, and the expulsion and concentration of magnetic fields in turbulent environments.