Understanding chemical evolution in resolved galaxies – I. The local star fraction-metallicity relation
Entity
UAM. Departamento de Física TeóricaPublisher
Oxford University Press on behalf of the Royal Astronomical SocietyDate
2015-02-26Citation
10.1093/mnras/stv098
Monthly Notices of Royal Astronomical Society 448.3 (2015): 2126-2134
ISSN
0035-8711 (print); 1365-2966 (online)DOI
10.1093/mnras/stv098Funded by
Financial support has been provided by project AYA2010-21887-C04-03 (former Ministerio de Ciencia e Innovación, Spain), AYA2013-47742-C4-3-P (Ministerio de Economía y Competitividad), and the‘Study of Emission-Line Galaxies with Integral-Field Spectroscopy’ (SELGIFS) programme,funded by the EU(FP7-PEOPLE-2013-IRSES-612701). YA is also supported by the Ramón y Cajal programme (RyC-2011-09461), currently managed by the Ministerio de Economía y Competitividad (still cutting back on the Spanishs cientifc infrastructure).Project
Gobierno de España. AYA2010-21887-C04-03; Gobierno de España. AYA2013-47742-C4-3-P; info:eu-repo/grantAgreement/EC/FP7/612701; Gobierno de España. RyC-2011-09461Editor's Version
http://dx.doi.org/10.1093/mnras/stv098Subjects
Galaxies: abundances; Galaxies: evolution; Galaxies: fundamental parameters; FísicaNote
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2015 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reservedRights
© 2015 The Authors: Published by Oxford University Press on behalf of the Royal Astronomical SocietyAbstract
This work studies the relation between gas-phase oxygen abundance and stellar-to-gas fraction in nearby galaxies. We first derive the theoretical prediction, and argue that this relation is fundamental, in the sense that it must be verified regardless of the details of the - gas accretion and star formation histories. Moreover, it should hold on "local" scales, i.e. in regions of the order of 1 kpc. These predictions are then compared with a set of spectroscopic observations, including both integrated and resolved data. Although the results depend somewhat on the adopted metallicity calibration, observed galaxies are consistent with the predicted relation, imposing tight constraints on the mass-loading factor of (enriched) galactic winds. The proposed parametrization of the star fraction-metallicity relation is able to describe the observed dependence of the oxygen abundance on gas mass at fixed stellar mass. However, the "local" mass-metallicity relation also depends on the relation between stellar and gas surface densities.
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Google Scholar:Ascasibar Sequeiros, Yago
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Gavilán, M.
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Pinto, N.
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Casado, J.
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Rosales, F.
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Díaz Beltrán, Ángeles Isabel
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