Fundamental Stellar Parameters

Special Session 3 @ EWASS 2013

Monday, July 8th  (.11.45-18.00.)

                                                                                                                          

Scientific Rationale

Extensive high precision surveys of stellar populations in our Galaxy (the CoRoT, Kepler and Gaia space missions, the Gaia-ESO spectroscopic Survey) are a major investment of the European astronomical Community for the next few years. To make best use of them, it is urgent to pin down the fundamental scale that translates stellar observables into physical parameters. Whether this arises from systematics in the analysis or from the adoption of realistic physics and model atmospheres for interpreting the observations, different methods and approaches might diverge by about 100 K in temperature and 0.1 dex in metallicity, seriously limiting high accuracy stellar and Galactic astrophysics. Fundamental stellar parameters are also a crucial complementary information for asteroseismology, which is providing an entirely new view on stellar populations.

This Special Session aims to:
present the latest results on fundamental stellar parameters from different methods: spectroscopy, photometry, interferometry, InfraRed Flux Method, solar twins, binaries;
review the current precision and uncertainties in the temperature and metallicity scale, and which standards must be met to maximize the scientific return of the surveys (Kepler, Gaia etc.);
discuss what observational/theoretical steps are necessary to settle remaining discrepancies