The Gaia-ESO Survey: the origin and evolution of s-process elements

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The Gaia-ESO Survey : the origin and evolution of s-process elements

Magrini, L. (författare): Osserv Astrofis Arcetri, INAF, Largo E Fermi 5, I-50125 Florence, Italy,INAF - Osservatorio Astrofisico di Arcetri

Spina, L. (författare): Monash Univ, Sch Phys & Astron, Monash Ctr Astrophys, Clayton, Vic 3800, Australia,Monash University

Randich, S. (författare): Osserv Astrofis Arcetri, INAF, Largo E Fermi 5, I-50125 Florence, Italy,INAF - Osservatorio Astrofisico di Arcetri,Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences

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Friel, E. (författare): Indiana Univ, Dept Astron, Bloomington, IN 47405 USA,Indiana University,CSIC Centro de Astrobiologia (INTA)

Kordopatis, G. (författare): Univ Cote Azur, Observ Cote Azur, CNRS, Lab Lagrange, Nice, France,Côte d'Azur Observatory

Worley, C. (författare): Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England,University of Cambridge

Pancino, E. (författare): Agenzia Spaziale Italiana, Space Sci Data Ctr, Via Politecn SNC, I-00133 Rome, Italy;Osserv Astrofis Arcetri, INAF, Largo E Fermi 5, I-50125 Florence, Italy,Italian Space Agency,INAF - Osservatorio Astrofisico di Arcetri

Bragaglia, A. (författare): Osservatorio Astrofis & Sci Spazio, INAF, Via Gobetti 93-3, I-40129 Bologna, Italy,INAF Istituto di Astrofisica Spaziale e Fisica Cosmica, Bologna

Donati, P. (författare): Osservatorio Astrofis & Sci Spazio, INAF, Via Gobetti 93-3, I-40129 Bologna, Italy,INAF Istituto di Astrofisica Spaziale e Fisica Cosmica, Bologna

Tautvaisiene, G. (författare): Vilnius Univ, Inst Theoret Phys & Astron, Astron Observ, Ave Sauletekio Al 3, LT-10257 Vilnius, Lithuania,Vilnius University

Bagdonas, V. (författare): Vilnius Univ, Inst Theoret Phys & Astron, Astron Observ, Ave Sauletekio Al 3, LT-10257 Vilnius, Lithuania,Vilnius University

Delgado-Mena, E. (författare): Univ Porto, CAUP, Inst Astrofis & Ciencias Espaco, Rua Estrelas, P-4150762 Porto, Portugal,University of Porto

Adibekyan, V. (författare): Univ Porto, CAUP, Inst Astrofis & Ciencias Espaco, Rua Estrelas, P-4150762 Porto, Portugal,University of Porto,INAF - Osservatorio Astronomico di Padova

Sousa, S. G. (författare): Univ Porto, CAUP, Inst Astrofis & Ciencias Espaco, Rua Estrelas, P-4150762 Porto, Portugal,University of Porto,University of Cambridge,INAF - Osservatorio Astrofisico di Arcetri

Jimenez-Esteban, F. M. (författare): CSIC, INTA, Ctr Astrobiol, Dept Astrofis, ESAC Campus,Camino Bajo del Castillo S-N, Madrid 28692, Spain,INAF - Osservatorio Astrofisico di Arcetri

Sanna, N. (författare): Osserv Astrofis Arcetri, INAF, Largo E Fermi 5, I-50125 Florence, Italy,INAF - Osservatorio Astrofisico di Arcetri

Roccatagliata, V. (författare): Osserv Astrofis Arcetri, INAF, Largo E Fermi 5, I-50125 Florence, Italy,INAF - Osservatorio Astrofisico di Arcetri

Bonito, R. (författare): Osserv Astron Palermo, INAF, Piazza Parlamento 1, I-90134 Palermo, Italy,INAF Palermo Astronomical Observatory

Sbordone, L. (författare): European Southern Observ, Alonso de Cordova 3107 Vitacura, Santiago, Chile,European Southern Observatory Santiago

Duffau, S. (författare): Univ Andres Bello, Dept Ciencias Fis, Fernandez Concha 700, Santiago, Chile,Andrés Bello National University

Gilmore, G. (författare): Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England,University of Padova

Feltzing, S. (författare): 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

Jeffries, R. D. (författare): Keele Univ, Astrophys Grp, Keele ST5 5BG, Staffs, England,Keele University

Vallenari, A. (författare): Padova Observ, INAF, Vicolo Osservatorio 5, I-35122 Padua, Italy

Alfaro, E. J. (författare): CSIC, Inst Astrofis Andalucia, Apdo 3004, E-18080 Granada, Spain,CSIC Instituto de Astrofísica de Andalucía (IAA)

Bensby, T. (författare): 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

Francois, P. (författare): Univ Paris Diderot, CNRS, Observ Paris, GEPI, 5 Pl Jules Janssen, F-92190 Meudon, France,Paris Diderot University

Koposov, S. (författare): Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England,University of Cambridge

Korn, Andreas, 1972- (författare): Uppsala University,Uppsala universitet,Institutionen för fysik och astronomi

Recio-Blanco, A. (författare): Univ Nice Sophia Antipolis, Observ Cote Azur, CNRS, Lab Lagrange,UMR7293, CS 34229, F-06304 Nice 4, France,Université Nice Sophia Antipolis

Smiljanic, R. (författare): Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland

Bayo, A. (författare): Univ Valparaiso, Millennium Nucleus Nucleo Planet Format, Valparaiso, Chile;Univ Valparaiso, Inst Fis & Astron, Valparaiso, Chile,University of Valparaíso

Carraro, G. (författare): Univ Padua, Dipartimento Fis & Astron, Vicolo Osservatorio 3, I-35122 Padua, Italy

Casey, A. R. (författare): Monash Univ, Sch Phys & Astron, Monash Ctr Astrophys, Clayton, Vic 3800, Australia,Monash University

Costado, M. T. (författare): Univ Cadiz, Dept Didact, Cadiz 11519, Spain,University of Cádiz,Instituto de Astrofísica de Canarias,University of La Laguna (ULL)

Damiani, F. (författare): Osserv Astron Palermo, INAF, Piazza Parlamento 1, I-90134 Palermo, Italy,INAF Palermo Astronomical Observatory

Franciosini, E. (författare): Osserv Astrofis Arcetri, INAF, Largo E Fermi 5, I-50125 Florence, Italy

Frasca, A. (författare): Osserv Astrofis Catania, INAF, Via S Sofia 78, I-95123 Catania, Italy,Osservatorio Astrofisico di Catania

Hourihane, A. (författare): Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England,University of Cambridge

Jofre, P. (författare): Univ Diego Portales, Fac Ingn, Nucleo Astron, Ave Ejercito 441, Santiago, Chile,Diego Portales University

de Laverny, P. (författare): Univ Nice Sophia Antipolis, Observ Cote Azur, CNRS, Lab Lagrange,UMR7293, CS 34229, F-06304 Nice 4, France,Université Nice Sophia Antipolis,INAF Palermo Astronomical Observatory

Lewis, J. (författare): Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England,University of Cambridge

Masseron, T. (författare): Univ La Laguna, Dept Astrofis, E-38206 Tenerife, Spain;Inst Astrofis Canarias, Tenerife 38205, Spain

Monaco, L. (författare): Univ Andres Bello, Dept Ciencias Fis, Fernandez Concha 700, Santiago, Chile,Andrés Bello National University

Morbidelli, L. (författare): Osserv Astrofis Arcetri, INAF, Largo E Fermi 5, I-50125 Florence, Italy,INAF - Osservatorio Astrofisico di Arcetri

Prisinzano, L. (författare): Osserv Astron Palermo, INAF, Piazza Parlamento 1, I-90134 Palermo, Italy

Sacco, G. (författare): Osserv Astrofis Arcetri, INAF, Largo E Fermi 5, I-50125 Florence, Italy

Zaggia, S. (författare): Padova Observ, INAF, Vicolo Osservatorio 5, I-35122 Padua, Italy,INAF - Osservatorio Astronomico di Padova

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2018-09-25
2018
Engelska.
Ingår i: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 617

Relaterad länk:: https://www.aanda.or...; visa fler...; http://dx.doi.org/10...; https://urn.kb.se/re...; https://doi.org/10.1...; https://lup.lub.lu.s...; visa färre...

Tidskriftsartikel (refereegranskat)

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Context. Several works have found an increase of the abundances of the s-process neutron-capture elements in the youngest Galactic stellar populations. These trends provide important constraints on stellar and Galactic evolution and they need to be confirmed with large and statistically significant samples of stars spanning wide age and distance intervals. Aims. We aim to trace the abundance patterns and the time evolution of five s-process elements - two belonging to the first peak, Y and Zr, and three belonging to the second peak, Ba, La, and Ce - using the Gaia-ESO DRS results for open clusters and disc stars. Methods. From the UVES spectra of cluster member stars, we determined the average composition of clusters with ages >0.1 Gyr. We derived statistical ages and distances of field stars, and we separated them into thin and thick disc populations. We studied the time-evolution and dependence on metallicity of abundance ratios using open clusters and field stars whose parameters and abundances were derived in a homogeneous way. Results. Using our large and homogeneous sample of open clusters, thin and thick disc stars, spanning an age range larger than 10 Gyr, we confirm an increase towards young ages of s-process abundances in the solar neighbourhood. These trends are well defined for open clusters and stars located nearby the solar position and they may be explained by a late enrichment due to significant contribution to the production of these elements from long-living low-mass stars. At the same time, we find a strong dependence of the s-process abundance ratios on the Galactocentric distance and on the metallicity of the clusters and field stars. Conclusions. Our results, derived from the largest and most homogeneous sample of s-process abundances in the literature, confirm the growth with decreasing stellar ages of the s-process abundances in both field and open cluster stars. At the same time, taking advantage of the abundances of open clusters located in a wide Galactocentric range, these results offer a new perspective on the dependence of the s-process evolution on the metallicity and star formation history, pointing to different behaviours at various Galactocentric distances.

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The Gaia-ESO Survey : the origin and evolution of s-process elements

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