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Sökning: WFRF:(Koposov R. A.) > (2020-2024) > The Gaia-ESO survey :

  • Casali, G.Univ Firenze, Dipartimento Fis & Astron, Via G Sansone 1, I-50019 Florence, Italy.;INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy.,INAF - Osservatorio Astrofisico di Arcetri,University of Florence (författare)

The Gaia-ESO survey : the non-universality of the age-chemical-clocks-metallicity relations in the Galactic disc

  • Artikel/kapitelEngelska2020

Förlag, utgivningsår, omfång ...

  • 2020-07-21
  • EDP Sciences,2020
  • printrdacarrier

Nummerbeteckningar

  • LIBRIS-ID:oai:DiVA.org:uu-420443
  • https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-420443URI
  • https://doi.org/10.1051/0004-6361/202038055DOI
  • https://lup.lub.lu.se/record/35749b77-1da5-44dc-b8cf-57a9e0b9738cURI

Kompletterande språkuppgifter

  • Språk:engelska
  • Sammanfattning på:engelska

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Klassifikation

  • Ämneskategori:ref swepub-contenttype
  • Ämneskategori:art swepub-publicationtype

Anmärkningar

  • Context. In the era of large spectroscopic surveys, massive databases of high-quality spectra coupled with the products of the Gaia satellite provide tools to outline a new picture of our Galaxy. In this framework, an important piece of information is provided by our ability to infer stellar ages, and consequently to sketch a Galactic timeline.Aims. We aim to provide empirical relations between stellar ages and abundance ratios for a sample of stars with very similar stellar parameters to those of the Sun, namely the so-called solar-like stars. We investigate the dependence on metallicity, and we apply our relations to independent samples, that is, the Gaia-ESO samples of open clusters and of field stars.Methods. We analyse high-resolution and high-signal-to-noise-ratio HARPS spectra of a sample of solar-like stars to obtain precise determinations of their atmospheric parameters and abundances for 25 elements and/or ions belonging to the main nucleosynthesis channels through differential spectral analysis, and of their ages through isochrone fitting.Results. We investigate the relations between stellar ages and several abundance ratios. For the abundance ratios with a steeper dependence on age, we perform multivariate linear regressions, in which we include the dependence on metallicity, [Fe/H]. We apply our best relations to a sample of open clusters located from the inner to the outer regions of the Galactic disc. Using our relations, we are able to recover the literature ages only for clusters located at R-GC > 7 kpc. The values that we obtain for the ages of the inner-disc clusters are much greater than the literature ones. In these clusters, the content of neutron capture elements, such as Y and Zr, is indeed lower than expected from chemical evolution models, and consequently their [Y/Mg] and [Y/Al] are lower than in clusters of the same age located in the solar neighbourhood. With our chemical evolution model and a set of empirical yields, we suggest that a strong dependence on the star formation history and metallicity-dependent stellar yields of s-process elements can substantially modify the slope of the [s/alpha]-[Fe/H]-age relation in different regions of the Galaxy.Conclusions. Our results point towards a non-universal relation [s/alpha]-[Fe/H]-age, indicating the existence of relations with different slopes and intercepts at different Galactocentric distances or for different star formation histories. Therefore, relations between ages and abundance ratios obtained from samples of stars located in a limited region of the Galaxy cannot be translated into general relations valid for the whole disc. A better understanding of the s-process at high metallicity is necessary to fully understand the origin of these variations.

Ämnesord och genrebeteckningar

Biuppslag (personer, institutioner, konferenser, titlar ...)

  • Spina, L.Monash Univ, Monash Ctr Astrophys, Sch Phys & Astron, Clayton, Vic 3800, Australia.;ARC Ctr Excellence All Sky Astrophys 3 Dimens AST, Sydney, NSW, Australia.,Monash University,Center of Excellence for Astrophysics in Three Dimensions (ASTRO-3D) (författare)
  • Magrini, L.INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy.,INAF - Osservatorio Astrofisico di Arcetri (författare)
  • Karakas, A. , ICenter of Excellence for Astrophysics in Three Dimensions (ASTRO-3D),Monash University (författare)
  • Kobayashi, C.Univ Hertfordshire, Ctr Astrophys Res, Coll Lane, Hatfield AL10 9AB, Herts, England.,University of Hertfordshire (författare)
  • Casey, A. R.Monash Univ, Monash Ctr Astrophys, Sch Phys & Astron, Clayton, Vic 3800, Australia.;ARC Ctr Excellence All Sky Astrophys 3 Dimens AST, Sydney, NSW, Australia.,Monash University,Center of Excellence for Astrophysics in Three Dimensions (ASTRO-3D) (författare)
  • Feltzing, S.Lund University,Lunds universitet,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science(Swepub:lu)astr-sfe (författare)
  • Van der Swaelmen, M.INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy.,INAF - Osservatorio Astrofisico di Arcetri,Center of Excellence for Astrophysics in Three Dimensions (ASTRO-3D),University of New South Wales (författare)
  • Tsantaki, M.INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy.,INAF - Osservatorio Astrofisico di Arcetri (författare)
  • Jofre, P.Univ Diego Portales, Fac Ingn, Nucleo Astron, Av Ejercito 441, Santiago, Chile.,Diego Portales University (författare)
  • Bragaglia, A.INAF Osservatorio Astrofis & Sci Spazio Bologna, Via Gobetti 93-3, I-40129 Bologna, Italy.,INAF Istituto di Astrofisica Spaziale e Fisica Cosmica, Bologna (författare)
  • Feuillet, D.Lund University,Lunds universitet,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science(Swepub:lu)di7483fe (författare)
  • Bensby, T.Lund University,Lunds universitet,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science(Swepub:lu)astr-tbe (författare)
  • Biazzo, K.Rome Astron Observ Oar, Via Frascati 33, I-00044 Monte Porzio Catone, Italy.,INAF-Osservatorio Astronomico di Roma (författare)
  • Gonneau, A.Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England.,University of Cambridge (författare)
  • Tautvaisiene, G.Vilnius Univ, Inst Theoret Phys & Astron, Sauletekio Av 3, LT-10257 Vilnius, Lithuania.,Vilnius University (författare)
  • Baratella, M.Dipartimento Fis & Astron Galileo Galilei, Vicolo Osservatorio 3, I-35122 Padua, Italy.,University of Padova (författare)
  • Roccatagliata, VINAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy.;Univ Pisa, Dipartimento Fis, Largo Bruno Pontecorvo 3, I-56127 Pisa, Italy.;Ist Nazl Fis Nucl, Sez Pisa, Largo Bruno Pontecorvo 3, I-56127 Pisa, Italy.,INAF - Osservatorio Astrofisico di Arcetri,University of Pisa,INFN Section of Pisa (författare)
  • Pancino, E.INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy.,INAF - Osservatorio Astrofisico di Arcetri (författare)
  • Sousa, S.Univ Porto, Inst Astrofis & Ciencias Espaco, CAUP, Rua Estrelas, P-41507 Porto, Portugal.,University of Porto,INAF - Osservatorio Astrofisico di Arcetri,Carnegie Mellon University,INAF - Osservatorio Astronomico di Padova (författare)
  • Adibekyan, VUniv Porto, Inst Astrofis & Ciencias Espaco, CAUP, Rua Estrelas, P-41507 Porto, Portugal.,University of Porto (författare)
  • Martell, S.ARC Ctr Excellence All Sky Astrophys 3 Dimens AST, Sydney, NSW, Australia.;Univ New South Wales, Sch Phys, Sydney, NSW 2052, Australia. (författare)
  • Bayo, A.Univ Valparaiso, Fac Ciencias, Inst Fis & Astron, Av Gran Bretana 1111, Valparaiso, Chile.,University of Valparaíso (författare)
  • Jackson, R. J.Keele Univ, Res Inst Environm Phys Sci & Appl Math, Astrophys Grp, Keele ST5 5BG, Staffs, England.,Keele University (författare)
  • Jeffries, R. D.Keele Univ, Res Inst Environm Phys Sci & Appl Math, Astrophys Grp, Keele ST5 5BG, Staffs, England.,Keele University (författare)
  • Gilmore, G.Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England.,University of Cambridge,INAF - Osservatorio Astrofisico di Arcetri (författare)
  • Randich, S.INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy.,Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences (författare)
  • Alfaro, E.CSIC, Inst Astrofis Andaluc, Apdo 3004, Granada 18080, Spain.,CSIC Instituto de Astrofísica de Andalucía (IAA) (författare)
  • Koposov, S. E.Carnegie Mellon Univ, McWilliams Ctr Cosmol, Dept Phys, 5000 Forbes Ave, Pittsburgh, PA 15213 USA. (författare)
  • Korn, Andreas,1972-Uppsala University,Uppsala universitet,Observationell astrofysik(Swepub:uu)ankor103 (författare)
  • Recio-Blanco, A.Univ Nice Sophia Antipolis, CNRS, Lab Lagrange, Observ Cote dAzur,UMR7293, CS 34229, F-06304 Nice 4, France.,Laboratoire Joseph-Louis Lagrange (författare)
  • Smiljanic, R.Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland. (författare)
  • Franciosini, E.INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy.,INAF - Osservatorio Astrofisico di Arcetri (författare)
  • Hourihane, A.Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England.,University of Cambridge (författare)
  • Monaco, L.Univ Andres Bello, Dept Ciencias Fis, Fernandez Concha 700, Santiago, Chile.,Andrés Bello National University (författare)
  • Morbidelli, L.INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy.,INAF - Osservatorio Astrofisico di Arcetri (författare)
  • Sacco, G.INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy. (författare)
  • Worley, C.Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England.,University of Cambridge (författare)
  • Zaggia, S.INAF Padova Observ, Vicolo Osservatorio 5, I-35122 Padua, Italy. (författare)
  • Univ Firenze, Dipartimento Fis & Astron, Via G Sansone 1, I-50019 Florence, Italy.;INAF Osservatorio Astrofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy.INAF - Osservatorio Astrofisico di Arcetri (creator_code:org_t)

Sammanhörande titlar

  • Ingår i:Astronomy and Astrophysics: EDP Sciences6390004-63611432-0746

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