The Gaia-ESO survey: Age-chemical-clock relations spatially resolved in the Galactic disc
Context. The last decade has seen a revolution in our knowledge of the Galaxy thanks to the Gaia and asteroseismic space missions and the ground-based spectroscopic surveys. Aims. To complete this picture, it is necessary to map the ages of its stellar populations. During recent years, the dependenc...
| Autores: | , |
|---|---|
| Formato: | artículo |
| Fecha de publicación: | 2022 |
| País: | España |
| Recursos: | Universidad Complutense de Madrid (UCM) |
| Repositorio: | Docta Complutense |
| Idioma: | inglés |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/72475 |
| Acesso em linha: | https://hdl.handle.net/20.500.14352/72475 |
| Access Level: | acceso abierto |
| Palavra-chave: | 52 Neutron-capture elements Cluster ngc 6791 Radial migration Galah survey Solar twins Evolution Abundance Stars Barium Old Astrofísica |
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The Gaia-ESO survey: Age-chemical-clock relations spatially resolved in the Galactic discMontes Gutiérrez, Davidotros, ...52Neutron-capture elementsCluster ngc 6791Radial migrationGalah surveySolar twinsEvolutionAbundanceStarsBariumOldAstrofísicaContext. The last decade has seen a revolution in our knowledge of the Galaxy thanks to the Gaia and asteroseismic space missions and the ground-based spectroscopic surveys. Aims. To complete this picture, it is necessary to map the ages of its stellar populations. During recent years, the dependence on time of abundance ratios involving slow (s) neutron-capture and ff elements (called chemical-clocks) has been used to provide estimates of stellar ages, usually in a limited volume close to the Sun. We aim to analyse the relations of chemical clocks in the Galactic disc extending the range to R-GC similar to 6-20 kpc. Methods. Using the sixth internal data release of the Gaia-ESO survey, we calibrated several relations between stellar ages and abundance ratios [s/alpha] using a sample of open clusters, the largest one so far used with this aim (62 clusters). Thanks to their wide galactocentric coverage, we investigated the radial variations of the shape of these relations, confirming their non-universality. Results. The multi-variate relations allowed us to infer stellar ages for field stars. We estimated our accuracy (ranging from 0.0 to -0.9 Gyr) and precision (from 0.4 to 2.3 Gyr) in recovering the global ages of open clusters, and the ages of their individual members. We applied the relations with the highest correlation coe fficients to the field star population, finding an older population at lower metallicity and higher [alpha/Fe] in the thin disc, and a younger one at higher [Fe/H] and low [alpha/Fe], as expected. Conclusion. We confirm that there is no single age-chemical clock relationship valid for the whole disc, but that there is a dependence on the galactocentric position, which is related to the radial variation of the star formation history combined with the non-monotonic dependence on metallicity of the yields of the s-process elements from low- and intermediate-mass stars. Finally, the abundance ratios [Ba/alpha] are more sensitive to age than those with [Y/alpha] for young disc stars, and their slopes vary less with galactocentric distance. We remind the reader that the application of such relationships to field stars is only of statistical value.EDP ScienciesUniversidad Complutense de Madrid20222022-04-2620222022-04-26journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/72475reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/724752026-06-02T12:44:21Z |
| dc.title.none.fl_str_mv |
The Gaia-ESO survey: Age-chemical-clock relations spatially resolved in the Galactic disc |
| title |
The Gaia-ESO survey: Age-chemical-clock relations spatially resolved in the Galactic disc |
| spellingShingle |
The Gaia-ESO survey: Age-chemical-clock relations spatially resolved in the Galactic disc Montes Gutiérrez, David 52 Neutron-capture elements Cluster ngc 6791 Radial migration Galah survey Solar twins Evolution Abundance Stars Barium Old Astrofísica |
| title_short |
The Gaia-ESO survey: Age-chemical-clock relations spatially resolved in the Galactic disc |
| title_full |
The Gaia-ESO survey: Age-chemical-clock relations spatially resolved in the Galactic disc |
| title_fullStr |
The Gaia-ESO survey: Age-chemical-clock relations spatially resolved in the Galactic disc |
| title_full_unstemmed |
The Gaia-ESO survey: Age-chemical-clock relations spatially resolved in the Galactic disc |
| title_sort |
The Gaia-ESO survey: Age-chemical-clock relations spatially resolved in the Galactic disc |
| dc.creator.none.fl_str_mv |
Montes Gutiérrez, David otros, ... |
| author |
Montes Gutiérrez, David |
| author_facet |
Montes Gutiérrez, David otros, ... |
| author_role |
author |
| author2 |
otros, ... |
| author2_role |
author |
| dc.contributor.none.fl_str_mv |
Universidad Complutense de Madrid |
| dc.subject.none.fl_str_mv |
52 Neutron-capture elements Cluster ngc 6791 Radial migration Galah survey Solar twins Evolution Abundance Stars Barium Old Astrofísica |
| topic |
52 Neutron-capture elements Cluster ngc 6791 Radial migration Galah survey Solar twins Evolution Abundance Stars Barium Old Astrofísica |
| description |
Context. The last decade has seen a revolution in our knowledge of the Galaxy thanks to the Gaia and asteroseismic space missions and the ground-based spectroscopic surveys. Aims. To complete this picture, it is necessary to map the ages of its stellar populations. During recent years, the dependence on time of abundance ratios involving slow (s) neutron-capture and ff elements (called chemical-clocks) has been used to provide estimates of stellar ages, usually in a limited volume close to the Sun. We aim to analyse the relations of chemical clocks in the Galactic disc extending the range to R-GC similar to 6-20 kpc. Methods. Using the sixth internal data release of the Gaia-ESO survey, we calibrated several relations between stellar ages and abundance ratios [s/alpha] using a sample of open clusters, the largest one so far used with this aim (62 clusters). Thanks to their wide galactocentric coverage, we investigated the radial variations of the shape of these relations, confirming their non-universality. Results. The multi-variate relations allowed us to infer stellar ages for field stars. We estimated our accuracy (ranging from 0.0 to -0.9 Gyr) and precision (from 0.4 to 2.3 Gyr) in recovering the global ages of open clusters, and the ages of their individual members. We applied the relations with the highest correlation coe fficients to the field star population, finding an older population at lower metallicity and higher [alpha/Fe] in the thin disc, and a younger one at higher [Fe/H] and low [alpha/Fe], as expected. Conclusion. We confirm that there is no single age-chemical clock relationship valid for the whole disc, but that there is a dependence on the galactocentric position, which is related to the radial variation of the star formation history combined with the non-monotonic dependence on metallicity of the yields of the s-process elements from low- and intermediate-mass stars. Finally, the abundance ratios [Ba/alpha] are more sensitive to age than those with [Y/alpha] for young disc stars, and their slopes vary less with galactocentric distance. We remind the reader that the application of such relationships to field stars is only of statistical value. |
| publishDate |
2022 |
| dc.date.none.fl_str_mv |
2022 2022-04-26 2022 2022-04-26 |
| dc.type.none.fl_str_mv |
journal article http://purl.org/coar/resource_type/c_6501 |
| dc.type.openaire.fl_str_mv |
info:eu-repo/semantics/article |
| format |
article |
| dc.identifier.none.fl_str_mv |
https://hdl.handle.net/20.500.14352/72475 |
| url |
https://hdl.handle.net/20.500.14352/72475 |
| dc.language.none.fl_str_mv |
Inglés eng |
| language_invalid_str_mv |
Inglés |
| language |
eng |
| dc.rights.none.fl_str_mv |
open access http://purl.org/coar/access_right/c_abf2 |
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info:eu-repo/semantics/openAccess |
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open access http://purl.org/coar/access_right/c_abf2 |
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openAccess |
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application/pdf |
| dc.publisher.none.fl_str_mv |
EDP Sciencies |
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EDP Sciencies |
| dc.source.none.fl_str_mv |
reponame:Docta Complutense instname:Universidad Complutense de Madrid (UCM) |
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Universidad Complutense de Madrid (UCM) |
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Docta Complutense |
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Docta Complutense |
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1869422249509912576 |
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15.301629 |