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

Towards the big picture: fundamental parameters of stars (abundances, ages, mass, multiplicity..)

• Quality = Quantity? How accurately and precisely can we determine fundamental stellar parameters?
• What is the accuracy of stellar parameters that is needed to address standing problems in studies of exoplanets, stellar populations, galaxies?

Towards new generation of physical models of stellar atmospheres, stellar structure and evolution:

• What are the key unknowns in our understanding of stellar structure and evolution?
• Which new theoretical approaches could be used in conjunction with the data to advance stellar modelling?
• How can we reduce our dependence on calibrations to observations, in order to make stellar models more predictive?
• Beyond the classical physics: MHD, binary evolution, diffusion, mixing

Towards new empirical constraints of stellar structure - time-domain photometry, spectroscopy, astrometry:

• How do we combine the information from various types of surveys (asteroseismic, spectroscopic, interferometric, astrometric) to learn about stellar physics?
• What are best mathematical and physical methods to extract information from noisy data?

Towards the big picture: fundamental parameters of stars

• What are the major challenges across other fields of astrophysics that would benefit from improvement of stellar models?
• Synergies between different observational surveys and their cross-disciplinary impact