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The solar neighborhood age-metallicity relation - Does it exist?

Feltzing, Sofia LU ; Holmberg, Johan LU and Hurley, J (2002) Workshop on Modes of Star Formation and the Origin of Field Populations In Modes of Star Formation and the Origin of Field Populations, Proceedings 285. p.243-247
Abstract
We test the hypothesis that the spread in the age-metallicity plot of the solar neighborhood is due to a mixture of stars belonging to kinematically different sub-populations of the Galactic disk, i.e., the thin and the thick disk. We use a kinematic subsample of similar to 600 stars from a sample of similar to 6000 dwarf and subgiant stars from the Hipparcos catalog. All of these stars have a full set of stellar parameters determined, including good ages. We find that a significant spread in [Me/H] is present in both kinematic populations, especially at large stellar ages. This implies that a simple one-to-one relation between ages and metallicities is not possible. In fact, there are stars that are-truly old and at the same time have... (More)
We test the hypothesis that the spread in the age-metallicity plot of the solar neighborhood is due to a mixture of stars belonging to kinematically different sub-populations of the Galactic disk, i.e., the thin and the thick disk. We use a kinematic subsample of similar to 600 stars from a sample of similar to 6000 dwarf and subgiant stars from the Hipparcos catalog. All of these stars have a full set of stellar parameters determined, including good ages. We find that a significant spread in [Me/H] is present in both kinematic populations, especially at large stellar ages. This implies that a simple one-to-one relation between ages and metallicities is not possible. In fact, there are stars that are-truly old and at the same time have [Me/H] > 0.2 dex. (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
Modes of Star Formation and the Origin of Field Populations, Proceedings
volume
285
pages
243 - 247
publisher
Astronomical Society of the Pacific
conference name
Workshop on Modes of Star Formation and the Origin of Field Populations
external identifiers
  • WOS:000180752500035
ISBN
1-58381-128-1
language
English
LU publication?
yes
id
d79e0e57-1253-46e5-8565-bd8e878ea68a (old id 1406935)
date added to LUP
2009-06-03 15:18:07
date last changed
2016-04-16 08:16:43
@inproceedings{d79e0e57-1253-46e5-8565-bd8e878ea68a,
  abstract     = {We test the hypothesis that the spread in the age-metallicity plot of the solar neighborhood is due to a mixture of stars belonging to kinematically different sub-populations of the Galactic disk, i.e., the thin and the thick disk. We use a kinematic subsample of similar to 600 stars from a sample of similar to 6000 dwarf and subgiant stars from the Hipparcos catalog. All of these stars have a full set of stellar parameters determined, including good ages. We find that a significant spread in [Me/H] is present in both kinematic populations, especially at large stellar ages. This implies that a simple one-to-one relation between ages and metallicities is not possible. In fact, there are stars that are-truly old and at the same time have [Me/H] > 0.2 dex.},
  author       = {Feltzing, Sofia and Holmberg, Johan and Hurley, J},
  booktitle    = {Modes of Star Formation and the Origin of Field Populations, Proceedings},
  isbn         = {1-58381-128-1},
  language     = {eng},
  pages        = {243--247},
  publisher    = {Astronomical Society of the Pacific},
  title        = {The solar neighborhood age-metallicity relation - Does it exist?},
  volume       = {285},
  year         = {2002},
}