The Gaia-ESO Survey Mg-Al anti-correlation in iDR4 globular clusters

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The Gaia-ESO Survey Mg-Al anti-correlation in iDR4 globular clusters

Pancino, E. (författare): Osserv Astrofis Arcetri, INAF, Largo Enrico Fermi 5, I-50125 Florence, Italy.;ASI Sci Data Ctr, Via Politecn Snc, I-01333 Rome, Italy.,INAF - Osservatorio Astrofisico di Arcetri,Italian Space Agency

Romano, D. (författare): Osservatorio Astron Bologna, INAF, Via Ranzani 1, I-40127 Bologna, Italy.,INAF Osservatorio Astronomico di Bologna

Tang, B. (författare): Univ Concepcion, Dept Astron, Casilla 160-C, Concepcion, Chile.,University of Concepción

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

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

Gruyters, P. (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

Geisler, D. (författare): Univ Concepcion, Dept Astron, Casilla 160-C, Concepcion, Chile.,University of Concepción

San Roman, I. (författare): Ctr Estudios Fis Cosmos Aragon, Plaza San Juan 1, Teruel 44001, Spain.,Centro de Estudios de Física del Cosmos de Aragón

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

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

Bragaglia, A. (författare): Osservatorio Astron Bologna, INAF, Via Ranzani 1, I-40127 Bologna, Italy.,INAF Osservatorio Astronomico di Bologna

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

Korn, Andreas, 1972- (författare): Uppsala University,Uppsala universitet,Observationell astrofysik

Recio-Blanco, A. (författare): Univ Nice Sophia Antipolis, Observ Cote Azur, CNRS, Lab Lagrange,UMR 7293, 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.

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

Bayo, A. (författare): Univ Valparaiso, Inst Fis & Astron, Avda Gran Bretana 1111, Valparaiso, Chile.,University of Valparaíso

Costado, M. T. (författare): CSIC, Inst Astrofis Andalucia, Apdo 3004, Granada 18080, Spain.,CSIC Instituto de Astrofísica de Andalucía (IAA)

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

Jofre, P. (författare): Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England.;Univ Diego Port, Fac Ingn, Nucleo Astron, Av Ejercito 441, Santiago, Chile.,University of Cambridge,Diego Portales University

Lardo, C. (författare): Liverpool John Moores Univ, Astrophys Res Inst, 146 Brownlow Hill, Liverpool L3 5RF, Merseyside, England.,Liverpool John Moores University

de laverny, P. (författare): Univ Nice Sophia Antipolis, Observ Cote Azur, CNRS, Lab Lagrange,UMR 7293, CS 34229, F-06304 Nice 4, France.,Université Nice Sophia Antipolis

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 Enrico Fermi 5, I-50125 Florence, Italy.,INAF - Osservatorio Astrofisico di Arcetri

Sbordone, L. (författare): Millennium Inst Astrophys, Av Vicuna Mackenna 4860, Santiago 7820436, Chile.;Pontificia Univ Catolica Chile, Av Vicuna Mackenna 4860, Santiago 7820436, Chile.,Millennium Institute for Astrophysics,Pontifical Catholic University of Chile

Sousa, S. G. (författare): Univ Porto, CAUP, Inst Astrofis & Ciencias Espaco, Rua Estrelas, P-4150762 Oporto, Portugal.,University of Porto

Villanova, S. (författare): Univ Concepcion, Dept Astron, Casilla 160-C, Concepcion, Chile.,University of Concepción

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Osserv Astrofis Arcetri, INAF, Largo Enrico Fermi 5, I-50125 Florence, Italy;ASI Sci Data Ctr, Via Politecn Snc, I-01333 Rome, Italy. INAF - Osservatorio Astrofisico di Arcetri (creator_code:org_t)

2017-05-15
2017
Engelska.
Ingår i: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 601

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Tidskriftsartikel (refereegranskat)

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We use Gaia-ESO (GES) Survey iDR4 data to explore the Mg-Alanti-correlation in globular clusters that were observed as calibrators, as a demonstration of the quality of Gaia-ESO Survey data and analysis. The results compare well with the available literature, within 0.1 dex or less, after a small (compared to the internal spreads) off set between the UVES and GIRAFFE data of 0.10-0.15 dex was taken into account. In particular, for the first time we present data for NGC 5927, which is one of the most metal-rich globular clusters studied in the literature so far with [Fe/H] = -0.39 +/- 0.04 dex; this cluster was included to connect with the open cluster regime in the Gaia-ESO Survey internal calibration. The extent and shape of the Mg-Al anti-correlation provide strong constraints on the multiple population phenomenon in globular clusters. In particular, we studied the dependency of the Mg-Al anti-correlation extension with metallicity, present-day mass, and age of the clusters, using GES data in combination with a large set of homogenized literature measurements. We find a dependency with both metallicity and mass, which is evident when fitting for the two parameters simultaneously, but we do not find significant dependency with age. We confirm that the Mg-Al anti-correlation is not seen in all clusters, but disappears for the less massive or most metal-rich clusters. We also use our data set to see whether a normal anti-correlation would explain the low [Mg/ff] observed in some extragalactic globular clusters, but find that none of the clusters in our sample can reproduce it; a more extreme chemical composition, such as that of NGC 2419, would be required. We conclude that GES iDR4 data already meet the requirements set by the main survey goals and can be used to study globular clusters in detail, even if the analysis procedures were not specifically designed for them.

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The Gaia-ESO Survey Mg-Al anti-correlation in iDR4 globular clusters

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