In the "Solar and Stellar Interiors" department, Laurent Gizon, Tom Duvall, Jesper Schou, Aaron Birch, Robert Cameron, Friedrich Kupka and others offer PhD projects in solar physics and astrophysics. Helioseismology and asteroseismology are used as important tools to study the oscillating Sun and stars.
Inversion codes are used to aid the detailed interpretation of solar spectro-polarimetric data. This computer code attempts to find the atmospheric structure that produced an observed spectrum by minimizing the difference between the observed spectrum and a Stokes spectrum.
Age is a fundamental property of stars and essential to understand the evolution of stars, planetary systems, and the Galaxy. However, age is the most poorly known property of a star. The group uses methods of asteroseismology to determine the ages of thousands of stars with unprecedented precision.