Advanced

The age of the Galaxy's thick disk

Feltzing, Sofia LU and Bensby, Thomas LU (2009) Ages of stars In Proceedings of the International Astronomical Union, IAU Proceedings 258. p.23-30
Abstract
We discuss the age of the stellar disks in the solar neighborhood. After reviewing the various methods for age dating, we discuss current estimates of the ages of both the thin- and the thick disks. We present preliminary results for kineymatically-selected stars that belong to the thin- as well as the thick disk. All of these dwarf and sub-giant stars have been studied spectroscopically and we have derived both elemental abundances as well as ages for them. A general conclusion is that in the solar neighborhood, on average, the thick disk is older than the thin disk. However, we caution that the exclusion of stars with effective temperatures around 6500 K might result in a biased view of the full age distribution for the stars in the... (More)
We discuss the age of the stellar disks in the solar neighborhood. After reviewing the various methods for age dating, we discuss current estimates of the ages of both the thin- and the thick disks. We present preliminary results for kineymatically-selected stars that belong to the thin- as well as the thick disk. All of these dwarf and sub-giant stars have been studied spectroscopically and we have derived both elemental abundances as well as ages for them. A general conclusion is that in the solar neighborhood, on average, the thick disk is older than the thin disk. However, we caution that the exclusion of stars with effective temperatures around 6500 K might result in a biased view of the full age distribution for the stars in the thick disk. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
stars: late-type, Galaxy: disk, Galaxy: structure, kinematics and dynamics, solar, Hertzsprung-Russell diagram, neighborhood
in
Proceedings of the International Astronomical Union, IAU Proceedings
volume
258
pages
23 - 30
publisher
Cambridge University Press
conference name
Ages of stars
external identifiers
  • wos:000268929300003
ISSN
1743-9221
1743-9213
DOI
10.1017/S1743921309031676
language
English
LU publication?
yes
id
63e0e447-8031-4edd-a7ea-ea14346fd393 (old id 1477386)
date added to LUP
2009-09-22 15:41:01
date last changed
2016-09-22 13:50:32
@inproceedings{63e0e447-8031-4edd-a7ea-ea14346fd393,
  abstract     = {We discuss the age of the stellar disks in the solar neighborhood. After reviewing the various methods for age dating, we discuss current estimates of the ages of both the thin- and the thick disks. We present preliminary results for kineymatically-selected stars that belong to the thin- as well as the thick disk. All of these dwarf and sub-giant stars have been studied spectroscopically and we have derived both elemental abundances as well as ages for them. A general conclusion is that in the solar neighborhood, on average, the thick disk is older than the thin disk. However, we caution that the exclusion of stars with effective temperatures around 6500 K might result in a biased view of the full age distribution for the stars in the thick disk.},
  author       = {Feltzing, Sofia and Bensby, Thomas},
  booktitle    = {Proceedings of the International Astronomical Union, IAU Proceedings},
  issn         = {1743-9221},
  keyword      = {stars: late-type,Galaxy: disk,Galaxy: structure,kinematics and dynamics,solar,Hertzsprung-Russell diagram,neighborhood},
  language     = {eng},
  pages        = {23--30},
  publisher    = {Cambridge University Press},
  title        = {The age of the Galaxy's thick disk},
  url          = {http://dx.doi.org/10.1017/S1743921309031676},
  volume       = {258},
  year         = {2009},
}