Tracing the Galactic Thick Disk to Solar Metallicities

descriptionPublicationkeyboard_double_arrow_right Article , Preprint , Other literature type 06 Jun 2007Embargo end date: 01 Jan 2007 English Publisher:American Astronomical SocietyJournal:The Astrophysical Journal, volume 663, pages L13-L16 (issn: 0004-637X, eissn: 1538-4357,

Copyright policy )Funded by:NSF | CAREER: Chemical Enrichme...

Authors: Bensby, T.; Zenn, A. R.; Oey, M. S.; Feltzing, S.;

doi: 10.1086/519792 , 10.48550/arxiv.0705.2060

arXiv: 0705.2060

Tracing the Galactic Thick Disk to Solar Metallicities

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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

Accepted for publication in ApJ Letters

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Keywords

Astrophysics (astro-ph), FOS: Physical sciences, Astrophysics

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