Stellar Astrophysics in the Era of Gaia, Spectroscopic, and Asteroseismic Surveys

Over the past decade, the astronomical community has invested enormous efforts to exploit major ground- and space-based facilities. The advent of stellar spectroscopic surveys, such as Gaia-ESO, GALAH, and APOGEE, paved the way for the large-scale analysis of the chemical compositions of millions of stars. Time-domain photometry missions, such as CoRoT, Kepler, and TESS, allowed detailed characterization of the interior structure of stars by asteroseismic techniques. Interferometric observations with VLTI and CHARA provide new information about stellar diameters and the circumstellar environment. With Gaia, stellar luminosities and radii of millions of stars can now be derived. The upcoming facilities and surveys, such as SDSS-V, 4MOST, PLATO, LSST, and JWST will revolutionize the field with unique time-domain information, and an increase in sample size by orders of magnitude. The main challenge is to combine the large amount of high-quality observations into a general coherent picture of the fundamental parameters of stars and to position them within the context of theoretical stellar structure and stellar evolution. The MIAPP program will assess the state-of-the-art in the field and develop concepts for new strategies and models to move towards the percent-level precision and accuracy in diagnostics of stellar structure.

Topics: This MIAPP program will focus on theoretical and observational challenges in the broad area of Stellar Astrophysics.