Tracing the Galactic Thick Disk to Solar Metallicities
Bensby, T.; Zenn, A. R.; Oey, M. S.; Feltzing, S. (2007). Tracing the Galactic Thick Disk to Solar Metallicities. Astrophysical Journal, 663, (1), 13 - 16
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Published
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English
Authors:
Bensby, T.
;
Zenn, A. R.
;
Oey, M. S.
;
Feltzing, S.
Department:
Lund Observatory - Has been reorganised
Abstract:
We show that the Galactic thick disk reaches at least solar metallicities and that it experienced strong chemical enrichment during a period of ~3 Gyr, ending around 8-9 Gyr ago. This finding puts further constraints on the relation and interface between the thin and thick disks and their formation processes. Our results are based on a detailed elemental abundance analysis of 261 kinematically selected F and G dwarf stars in the solar neighborhood: 194 likely members of the thick disk and 67 likely members of the thin disk, in the range -1.3<~[Fe/H]<~+0.4.
Based on data collected with the 6.5 m Magellan telescopes at the Las Campanas Observatory and with the Very Large Telescope at the European Southern Observatory (ESO proposal 72.B-0179).
Keywords:
Galaxy: disk ;
Galaxy: evolution ;
Galaxy: formation ;
Solar neighborhood ;
Stars: abundances ;
Stars: kinematics
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