The age of the Galaxy's thick disk
Feltzing, Sofia; Bensby, Thomas (2009). The age of the Galaxy's thick disk Proceedings of the International Astronomical Union, IAU Proceedings, 258,, 23 - 30. Ages of stars: Cambridge University Press
Conference Proceeding/Paper
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Published
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English
Authors:
Feltzing, Sofia
;
Bensby, Thomas
Department:
Lund Observatory - Has been reorganised
Observational and Theoretical Astrophysics-lup-obsolete
Research Group:
Observational and Theoretical Astrophysics-lup-obsolete
Abstract:
We discuss the age of the stellar disks in the solar neighborhood. After reviewing the various methods for age dating, we discuss current estimates of the ages of both the thin- and the thick disks. We present preliminary results for kineymatically-selected stars that belong to the thin- as well as the thick disk. All of these dwarf and sub-giant stars have been studied spectroscopically and we have derived both elemental abundances as well as ages for them. A general conclusion is that in the solar neighborhood, on average, the thick disk is older than the thin disk. However, we caution that the exclusion of stars with effective temperatures around 6500 K might result in a biased view of the full age distribution for the stars in the thick disk.
Keywords:
stars: late-type ;
Galaxy: disk ;
Galaxy: structure ;
kinematics and dynamics ;
solar ;
Hertzsprung-Russell diagram ;
neighborhood
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