The solar neighbourhood age-metallicity relation - Does it exist?
Feltzing, Sofia LU
; Holmberg, Johan
LU
and Hurley, J R
(2001)
In Astronomy & Astrophysics
377.
p.911-924
- Abstract
- We derive stellar ages, from evolutionary tracks, and metallicities,from Strömgren photometry, for a sample of 5828 dwarf and sub-dwarfstars from the Hipparcos Catalogue. This stellar disk sample is used toinvestigate the age-metallicity diagram in the solar neighbourhood. Suchdiagrams are often used to derive a so called age-metallicity relation.Because of the size of our sample, we are able to quantify the impact onsuch diagrams, and derived relations, due to different selectioneffects. Some of these effects are of a more subtle sort, giving rise toerroneous conclusions. In particular we show that [1] theage-metallicity diagram is well populated at all ages and especiallythat old, metal-rich stars do exist, [2] the scatter in metallicity... (More)
- We derive stellar ages, from evolutionary tracks, and metallicities,from Strömgren photometry, for a sample of 5828 dwarf and sub-dwarfstars from the Hipparcos Catalogue. This stellar disk sample is used toinvestigate the age-metallicity diagram in the solar neighbourhood. Suchdiagrams are often used to derive a so called age-metallicity relation.Because of the size of our sample, we are able to quantify the impact onsuch diagrams, and derived relations, due to different selectioneffects. Some of these effects are of a more subtle sort, giving rise toerroneous conclusions. In particular we show that [1] theage-metallicity diagram is well populated at all ages and especiallythat old, metal-rich stars do exist, [2] the scatter in metallicity atany given age is larger than the observational errors, [3] the exclusionof cooler dwarf stars from an age-metallicity sample preferentiallyexcludes old, metal-rich stars, depleting the upper right-hand corner ofthe age-metallicity diagram, [4] the distance dependence found in theEdvardsson et al. sample by Garnett & Kobulnicky is an expectedartifact due to the construction of the original sample. We concludethat, although some of it can be attributed to stellar migration in thegalactic disk, a large part of the observed scatter is intrinsic to theformation processes of stars. Based on results from the ESA Hipparcossatellite. Full Table 1 is only available in electronic form at the CDSvia anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or viahttp://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/377/911 (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/130147
- author
- Feltzing, Sofia
LU
; Holmberg, Johan
LU
and Hurley, J R
- organization
- publishing date
- 2001
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Astronomy & Astrophysics
- volume
- 377
- pages
- 911 - 924
- publisher
- EDP Sciences
- external identifiers
-
- scopus:0035474653
- ISSN
- 0004-6361
- DOI
- 10.1051/0004-6361:20011119
- language
- English
- LU publication?
- yes
- id
- e0d374b7-9a81-4b8d-ada4-f724b6a1a271 (old id 130147)
- date added to LUP
- 2016-04-01 16:32:11
- date last changed
- 2022-12-12 19:35:30
@article{e0d374b7-9a81-4b8d-ada4-f724b6a1a271,
abstract = {{We derive stellar ages, from evolutionary tracks, and metallicities,from Strömgren photometry, for a sample of 5828 dwarf and sub-dwarfstars from the Hipparcos Catalogue. This stellar disk sample is used toinvestigate the age-metallicity diagram in the solar neighbourhood. Suchdiagrams are often used to derive a so called age-metallicity relation.Because of the size of our sample, we are able to quantify the impact onsuch diagrams, and derived relations, due to different selectioneffects. Some of these effects are of a more subtle sort, giving rise toerroneous conclusions. In particular we show that [1] theage-metallicity diagram is well populated at all ages and especiallythat old, metal-rich stars do exist, [2] the scatter in metallicity atany given age is larger than the observational errors, [3] the exclusionof cooler dwarf stars from an age-metallicity sample preferentiallyexcludes old, metal-rich stars, depleting the upper right-hand corner ofthe age-metallicity diagram, [4] the distance dependence found in theEdvardsson et al. sample by Garnett & Kobulnicky is an expectedartifact due to the construction of the original sample. We concludethat, although some of it can be attributed to stellar migration in thegalactic disk, a large part of the observed scatter is intrinsic to theformation processes of stars. Based on results from the ESA Hipparcossatellite. Full Table 1 is only available in electronic form at the CDSvia anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or viahttp://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/377/911}},
author = {{Feltzing, Sofia and Holmberg, Johan and Hurley, J R}},
issn = {{0004-6361}},
language = {{eng}},
pages = {{911--924}},
publisher = {{EDP Sciences}},
series = {{Astronomy & Astrophysics}},
title = {{The solar neighbourhood age-metallicity relation - Does it exist?}},
url = {{https://lup.lub.lu.se/search/files/4701625/624122.pdf}},
doi = {{10.1051/0004-6361:20011119}},
volume = {{377}},
year = {{2001}},
}