Tracing the galactic thick disk to solar metallicities

被引：133

作者：

Bensby, T. ^{[1
]}

Zenn, A. R. ^{[1
]}

Oey, M. S. ^{[1
]}

Feltzing, S. ^{[1
]}

机构：

[1] Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA

来源：

ASTROPHYSICAL JOURNAL | 2007年 / 663卷 / 01期

关键词：

galaxy : disk; galaxy : evolution; galaxy : formation; solar neighborhood; stars : abundances; stars : kinematics;

D O I：

10.1086/519792

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We show that the Galactic thick disk reaches at least solar metallicities and that it experienced strong chemical enrichment during a period of similar to 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.

引用

收藏

页码：L13 / L16

页数：4

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