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Thomas Bensby. Profile photo.

Thomas Bensby

Senior lecturer

Thomas Bensby. Profile photo.

Tracing the Galactic Thick Disk to Solar Metallicities

Author

  • T. Bensby
  • A. R. Zenn
  • M. S. Oey
  • S. Feltzing

Summary, in English

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).

Department/s

  • Lund Observatory - Undergoing reorganization

Publishing year

2007

Language

English

Pages

13-16

Publication/Series

Astrophysical Journal

Volume

663

Issue

1

Document type

Journal article

Publisher

American Astronomical Society

Topic

  • Astronomy, Astrophysics and Cosmology

Keywords

  • Galaxy: disk
  • Galaxy: evolution
  • Galaxy: formation
  • Solar neighborhood
  • Stars: abundances
  • Stars: kinematics

Status

Published

ISBN/ISSN/Other

  • ISSN: 0004-637X