The Gaia-ESO Survey: The N/O abundance ratio in the Milky Way

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The Gaia-ESO Survey : The N/O abundance ratio in the Milky Way

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

Vincenzo, F. (author): Univ Hertfordshire, Ctr Astrophys Res, Coll Lane, Hatfield AL10 9AB, Herts, England,University of Hertfordshire

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

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

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

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

Drazdauskas, A. (author): Vilnius Univ, Inst Theoret Phys & Astron, Sauletekio Av 3, LT-10257 Vilnius, Lithuania,Vilnius University

Mikolaitis, S. (author): Vilnius Univ, Inst Theoret Phys & Astron, Sauletekio Av 3, LT-10257 Vilnius, Lithuania,Vilnius University

Minkeviciute, R. (author): Vilnius Univ, Inst Theoret Phys & Astron, Sauletekio Av 3, LT-10257 Vilnius, Lithuania,Vilnius University

Stonkute, E. (author): Vilnius Univ, Inst Theoret Phys & Astron, Sauletekio Av 3, LT-10257 Vilnius, Lithuania,Vilnius University

Chorniy, Y. (author): Vilnius Univ, Inst Theoret Phys & Astron, Sauletekio Av 3, LT-10257 Vilnius, Lithuania,Vilnius University

Bagdonas, V. (author): Vilnius Univ, Inst Theoret Phys & Astron, Sauletekio Av 3, LT-10257 Vilnius, Lithuania,Vilnius University

Kordopatis, G. (author): Univ Cote dAzur, Observ Cote dAzur, CNRS, Lab Lagrange, Nice, France,University of Côte d'Azur

Friel, E. (author): Indiana Univ, Dept Astron, Bloomington, IN 47405 USA,Indiana University,Astrobiology Centre

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

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

Gilmore, G. (author): Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England,University of Cambridge,INAF - Osservatorio Astrofisico di Arcetri

Vallenari, A. (author): INAF Osservatorio Astron Padova, Vicolo Osservatorio 5, I-35122 Padua, Italy,INAF - Osservatorio Astronomico di Padova

Bensby, T. (author): 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

Bragaglia, A. (author): INAF Osservatorio Astron Bologna, Via Gobetti 93-3, I-40129 Bologna, Italy,INAF Istituto di Astrofisica Spaziale e Fisica Cosmica, Bologna

Korn, Andreas, 1972- (author): Uppsala University,Uppsala universitet,Teoretisk astrofysik

Lanzafame, A. C. (author): Univ Catania, Dipartimento Fis & Astron, Sez Astrofis, Via S Sofia 78, I-95123 Catania, Italy,University of Catania

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

Bayo, A. (author): Univ Valparaiso, Inst Fis & Astron, Valparaiso, Chile;Univ Valparaiso, Nucleo Milenio Formac Planetaria NPF, Av Gran Bretana 1111, Valparaiso, Chile,University of Valparaíso

Casey, A. R. (author): Monash Univ, Sch Phys & Astron, Monash Ctr Astrophys, Clayton, Vic 3800, Australia;Monash Univ, Monash Fac Informat Technol, Clayton, Vic 3800, Australia,Monash University

Costado, M. T. (author): Univ Cadiz, Dept Didact, Cadiz 11519, Spain,University of Cádiz

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

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

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

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

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

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

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

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

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(creator_code:org_t)

2018-10-17
2018
English.
In: Astronomy and Astrophysics. - : EDP SCIENCES S A. - 0004-6361 .- 1432-0746. ; 618

Related links:: https://www.aanda.or...; show more...; http://dx.doi.org/10...; https://urn.kb.se/re...; https://doi.org/10.1...; https://lup.lub.lu.s...; show less...

Journal article (peer-reviewed)

Abstract Subject headings

Context. The abundance ratio N/O is a useful tool to study the interplay of galactic processes, for example star formation efficiency, timescale of infall, and outflow loading factor. Aims. We aim to trace log(N/O) versus [Fe/H] in the Milky Way and to compare this ratio with a set of chemical evolution models to understand the role of infall, outflow, and star formation efficiency in the building up of the Galactic disc. Methods. We used the abundances from IDR2-3, IDR4, IDR5 data releases of the Gaia-ESO Survey both for Galactic field and open cluster stars. We determined membership and average composition of open clusters and we separated thin and thick disc field stars. We considered the effect of mixing in the abundance of N in giant stars. We computed a grid of chemical evolution models, suited to reproduce the main features of our Galaxy, exploring the effects of the star formation efficiency, infall timescale, and differential outflow. Results. With our samples, we map the metallicity range -0. 6 <= [Fe/H] <= 0.3 with a corresponding -1.2 <= log(N/O) <= -0.2, where the secondary production of N dominates. Thanks to the wide range of Galactocentric distances covered by our samples, we can distinguish the behaviour of log(N/O) in different parts of the Galaxy. Conclusions. Our spatially resolved results allow us to distinguish differences in the evolution of N/O with Galactocentric radius. Comparing the data with our models, we can characterise the radial regions of our Galaxy. A shorter infall timescale is needed in the inner regions, while the outer regions need a longer infall timescale, coupled with a higher star formation efficiency. We compare our results with nebular abundances obtained in MaNGA galaxies, finding in our Galaxy a much wider range of log(N/O) than in integrated observations of external galaxies of similar stellar mass, but similar to the ranges found in studies of individual H II regions.

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The Gaia-ESO Survey : The N/O abundance ratio in the Milky Way

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