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The Gaia-ESO Survey :
The Gaia-ESO Survey : Sodium and aluminium abundances in giants and dwarfs Implications for stellar and Galactic chemical evolution
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- Smiljanic, R. (författare)
- Nicolaus Copernicus Astron Ctr, Dept Astrophys, Ul Rabianska 8, PL-87100 Torun, Poland.,Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences,INAF - Osservatorio Astrofisico di Arcetri
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- Romano, D. (författare)
- Osservatorio Astron Bologna, INAF, Via Ranzani 1, I-40127 Bologna, Italy.,INAF Osservatorio Astronomico di Bologna
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- Bragaglia, A. (författare)
- Osservatorio Astron Bologna, INAF, Via Ranzani 1, I-40127 Bologna, Italy.,INAF Osservatorio Astronomico di Bologna
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visa fler...
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- Donati, P. (författare)
- Osservatorio Astron Bologna, INAF, Via Ranzani 1, I-40127 Bologna, Italy.;Univ Bologna, Dipartimento Fis & Astron, Via Ranzani 1, I-40127 Bologna, Italy.,University of Bologna
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- Magrini, L. (författare)
- Osserv Astrofis Arcetri, INAF, Largo Enrico Fermi 5, I-50125 Florence, Italy.,INAF - Osservatorio Astrofisico di Arcetri
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- Friel, E. (författare)
- Indiana Univ, Dept Astron, Bloomington, IN 47405 USA.,Indiana University
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- Jacobson, H. (författare)
- MIT, Kavli Inst Astrophys & Space Res, 77 Massachusetts Ave, Cambridge, MA 02139 USA.,Massachusetts Institute of Technology
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- Randich, S. (författare)
- Osserv Astrofis Arcetri, INAF, Largo Enrico Fermi 5, I-50125 Florence, Italy.
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- Ventura, P. (författare)
- Osserv Astron Roma, INAF, I-00040 Monte Porzio Catone, RM, Italy.,INAF-Osservatorio Astronomico di Roma
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- Lind, Karin (författare)
- Uppsala universitet,Observationell astrofysik,Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany.,Max Planck Institute for Astronomy
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- Bergemann, M. (författare)
- Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany.,Max Planck Institute for Astronomy
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- Nordlander, Thomas (författare)
- Uppsala University,Uppsala universitet,Teoretisk astrofysik
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- Morel, T. (författare)
- Univ Liege, Inst Astrophys & Geophys, Allee 6 Aout,Bat B5c, B-4000 Liege, Belgium.,University of Liège,INAF Osservatorio Astronomico di Bologna,CSIC Instituto de Astrofísica de Andalucía (IAA)
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- Pancino, E. (författare)
- Osservatorio Astron Bologna, INAF, Via Ranzani 1, I-40127 Bologna, Italy.;ASI Sci Data Ctr, Via Politecn SNC, I-00133 Rome, Italy.,Italian Space Agency
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- Tautvaisiene, G. (författare)
- Vilnius Univ, Inst Theoret Phys & Astron, Gostauto 12, LT-01108 Vilnius, Lithuania.,Vilnius University
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- Adibekyan, V. (författare)
- Univ Porto, CAUP, Inst Astrofis & Ciencias Espaco, Rua Estrelas, P-4150762 Oporto, Portugal.,University of Porto,INAF - Osservatorio Astronomico di Padova
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- Tosi, M. (författare)
- Osservatorio Astron Bologna, INAF, Via Ranzani 1, I-40127 Bologna, Italy.
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- Vallenari, A. (författare)
- Osserv Astron Padova, INAF, Vicolo Osservatorio 2, I-35122 Padua, Italy.
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- Gilmore, G. (författare)
- Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England.,University of Cambridge,European Southern Observatory Santiago,INAF - Osservatorio Astrofisico di Arcetri,University of Porto
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- Bensby, T. (författare)
- Lund University,Lunds universitet,Astronomi - Har omorganiserats,Institutionen för astronomi och teoretisk fysik - Har omorganiserats,Naturvetenskapliga fakulteten,Lund Observatory - Has been reorganised,Department of Astronomy and Theoretical Physics - Has been reorganised,Faculty of Science
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- Francois, P. (författare)
- PSL Res Univ, Univ Paris Diderot, Sorbonne Paris Cite, CNRS,Observ Paris,GEPI, 61 Ave Observ, F-75014 Paris, France.;Univ Picardie Jules Verne, Dept Phys, 33 Rue St Leu, F-80000 Amiens, France.,University of Picardie Jules Verne
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- Koposov, S. (författare)
- Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England.,University of Cambridge
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- Lanzafame, A. C. (författare)
- Univ Catania, Sez Astrofis, Dipartimento Fis & Astron, Via S Sofia 78, I-95123 Catania, Italy.,University of Catania
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- Recio-Blanco, A. (författare)
- Univ Nice Sophia Antipolis, CNRS, Observ Cote Azur, Lab Lagrange UMR7293, CS 34229, F-06304 Nice 4, France.,Côte d'Azur Observatory
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- Bayo, A. (författare)
- Univ Valparaiso, Inst Fis & Astron, Valparaiso, Chile.,University of Valparaíso
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- Carraro, G. (författare)
- European So Observ, Alonso Cordova 3107 Vitacura, Santiago 19, Chile.
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- Casey, A. R. (författare)
- Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England.,University of Cambridge
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- Costado, M. T. (författare)
- CSIC, Inst Astrofis Andalucia, Apdo 3004, E-18080 Granada, Spain.
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- Franciosini, E. (författare)
- Osserv Astrofis Arcetri, INAF, Largo Enrico Fermi 5, I-50125 Florence, Italy.,INAF - Osservatorio Astrofisico di Arcetri
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- Heiter, Ulrike (författare)
- Uppsala University,Uppsala universitet,Observationell astrofysik
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- Hill, V. (författare)
- Univ Nice Sophia Antipolis, CNRS, Observ Cote Azur, Lab Lagrange UMR7293, CS 34229, F-06304 Nice 4, France.,Côte d'Azur Observatory
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- Hourihane, A. (författare)
- Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England.,University of Cambridge
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- Jofre, P. (författare)
- Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England.,University of Cambridge
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- Lardo, C. (författare)
- Liverpool John Moores Univ, Astrophys Res Inst, 146 Brownlow Hill, Liverpool L3 5RF, Merseyside, England.,Liverpool John Moores University
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- de Laverny, P. (författare)
- Univ Nice Sophia Antipolis, CNRS, Observ Cote Azur, Lab Lagrange UMR7293, CS 34229, F-06304 Nice 4, France.,Côte d'Azur Observatory
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- Lewis, J. (författare)
- Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England.,University of Cambridge
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- Monaco, L. (författare)
- Univ Andres Bello, Dept Ciencias Fis, Republ 220, Santiago, Chile.,Andrés Bello National University
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- Morbidelli, L. (författare)
- Osserv Astrofis Arcetri, INAF, Largo Enrico Fermi 5, I-50125 Florence, Italy.,INAF - Osservatorio Astrofisico di Arcetri
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- Sacco, G. G. (författare)
- Osserv Astrofis Arcetri, INAF, Largo Enrico Fermi 5, I-50125 Florence, Italy.
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- Sbordone, L. (författare)
- Millennium Inst Astrophys, Av Vicuna Mackenna 4860, Santiago 7820436, Chile.;Pontificia Univ Catolica Chile, Av Vicuna Mackenna 4860, Santiago 7820436, Chile.,Pontifical Catholic University of Chile
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- Sousa, S. G. (författare)
- Univ Porto, CAUP, Inst Astrofis & Ciencias Espaco, Rua Estrelas, P-4150762 Oporto, Portugal.
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- Worley, C. C. (författare)
- Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England.,University of Cambridge
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- Zaggia, S. (författare)
- Osserv Astron Padova, INAF, Vicolo Osservatorio 2, I-35122 Padua, Italy.,INAF - Osservatorio Astronomico di Padova
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Nicolaus Copernicus Astron Ctr, Dept Astrophys, Ul Rabianska 8, PL-87100 Torun, Poland Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences (creator_code:org_t)
- 2016-04-21
- 2016
- Engelska.
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Ingår i: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 589
- Relaterad länk:
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https://www.aanda.or...
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http://dx.doi.org/10...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://lup.lub.lu.s...
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Abstract
Ämnesord
Stäng
- Context. Stellar evolution models predict that internal mixing should cause some sodium overabundance at the surface of red giants more massive than similar to 1.5-2.0 M-circle dot. The surface aluminium abundance should not be affected. Nevertheless, observational results disagree about the presence and/or the degree of Na and Al overabundances. In addition, Galactic chemical evolution models adopting different stellar yields lead to very different predictions for the behavior of [Na/Fe] and [Al/Fe] versus [Fe/H]. Overall, the observed trends of these abundances with metallicity are not well reproduced.Aims. We readdress both issues, using new Na and Al abundances determined within the Gaia-ESO Survey. Our aim is to obtain better observational constraints on the behavior of these elements using two samples: i) more than 600 dwarfs of the solar neighborhood and of open clusters and ii) low-and intermediate-mass clump giants in six open clusters.Methods. Abundances were determined using high-resolution UVES spectra. The individual Na abundances were corrected for nonlocal thermodynamic equilibrium effects. For the Al abundances, the order of magnitude of the corrections was estimated for a few representative cases. For giants, the abundance trends with stellar mass are compared to stellar evolution models. For dwarfs, the abundance trends with metallicity and age are compared to detailed chemical evolution models.Results. Abundances of Na in stars with mass below similar to 2.0 M-circle dot, and of Al in stars below similar to 3.0 M-circle dot, seem to be unaffected by internal mixing processes. For more massive stars, the Na overabundance increases with stellar mass. This trend agrees well with predictions of stellar evolutionary models. For Al, our only cluster with giants more massive than 3.0 M-circle dot, NGC 6705, is Al enriched. However, this might be related to the environment where the cluster was formed. Chemical evolution models that well fit the observed [Na/Fe] vs. [Fe/H] trend in solar neighborhood dwarfs cannot simultaneously explain the run of [Al/Fe] with [Fe/H], and vice versa. The comparison with stellar ages is hampered by severe uncertainties. Indeed, reliable age estimates are available for only a half of the stars of the sample. We conclude that Al is underproduced by the models, except for stellar ages younger than about 7 Gyr. In addition, some significant source of late Na production seems to be missing in the models. Either current Na and Al yields are affected by large uncertainties, and/or some important Galactic source(s) of these elements has as yet not been taken into account.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- Galaxy: abundances
- Galaxy: evolution
- stars: abundances
- stars: evolution
- stars: late-type
- Galaxy: abundances
- Galaxy: evolution
- Stars: abundances
- Stars: evolution
- Stars: late-type
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Till lärosätets databas
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Smiljanic, R.
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Romano, D.
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Bragaglia, A.
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Donati, P.
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Magrini, L.
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Friel, E.
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visa fler...
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Jacobson, H.
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Randich, S.
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Ventura, P.
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Lind, Karin
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Bergemann, M.
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Nordlander, Thom ...
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Morel, T.
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Pancino, E.
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Tautvaisiene, G.
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Adibekyan, V.
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Tosi, M.
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Vallenari, A.
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Gilmore, G.
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Bensby, T.
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Francois, P.
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Koposov, S.
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Lanzafame, A. C.
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Recio-Blanco, A.
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Bayo, A.
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Carraro, G.
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Casey, A. R.
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Costado, M. T.
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Franciosini, E.
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Heiter, Ulrike
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Hill, V.
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Hourihane, A.
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Jofre, P.
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Lardo, C.
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de Laverny, P.
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Lewis, J.
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Monaco, L.
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Morbidelli, L.
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Sacco, G. G.
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Sbordone, L.
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Sousa, S. G.
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Worley, C. C.
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Zaggia, S.
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