Physics
Scientific paper
Jan 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005esasp.576..121n&link_type=abstract
"Proceedings of the Gaia Symposium "The Three-Dimensional Universe with Gaia" (ESA SP-576). Held at the Observatoire de Paris-Me
Physics
1
Gaia, Stars Fundamental Parameters, Stars Abundances, Stars Kinematics, Galaxy Evolution
Scientific paper
Recent observational studies of the age-metallicity and [α/Fe] - [Fe/H] relations for stars in the solar neighbourhood are reviewed. It is still debated if there exists a well defined trend of [Fe/H] with age or if [Fe/H] has a substantial scatter at a given age. Systematic differences in [α/Fe] between stellar populations have recently been discovered, but a detailed mapping of how [α/Fe] varies as a function of stellar position and kinematics remains to be carried out. Gaia has the potential to give an important contribution to the solution of these problems, and hence to contribute very significantly to the study of Galactic chemical evolution and galaxy formation in general. The requirement to the accuracy of the determination of parameters and abundances of late-type stars is, however, quite high, i.e. σ(Teff ) 100 K, σ(MV) 0.2 mag, and σ[Fe/H] σ[α/Fe] 0.1 dex.
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