Thomas Bensby
Senior lecturer
Tracing the Galactic Thick Disk to Solar Metallicities
Author
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).
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 - Has been reorganised
Publishing year
2007
Language
English
Pages
13-16
Publication/Series
Astrophysical Journal
Volume
663
Issue
1
Links
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