PiCAROS: Pulsation Coupling And ROtation in Stars

 Stellar rotation is one of the most interesting aspects of modern stellar structure and evolution theory. However, although stellar rotation is present in every star and has a significant impact on both stellar structure and evolution, the precise extent of these effects is not well known. Since a few years, a lot of research has been done to understand the stellar rotation and the angular momentum transport inside stars.
Asteroseismology has proven to be an excellent tool for such studies. It is a young research field which allows us to directly probe the interior stellar structure by analysing and modeling observed stellar pulsations. Among other things, it has allowed us to successfully measure the interior rotation rate for many different types of stars. However, it has recently also been suggested that the stellar pulsations themselves may influence the stellar rotation.
We propose to use statistical analyses and the forward asteroseismic modelling of selected stars to characterise the stellar pulsations and to determine the difference in rotation between pulsating and nonpulsating stars. The high-quality photometry from space missions such as Kepler and TESS, the astrometry from the Gaia mission and ground-based spectroscopic observations present us with a first and excellent opportunity to evaluate the influence of stellar pulsations on stellar structure and evolution itself.