The gas metallicity gradient and the star formation activity of disc galaxies

We study oxygen abundance profiles of the gaseous disc components in simulated galaxies in a hierarchical universe. We analyse the disc metallicity gradients in relation to the stellar masses and star formation rates of the simulated galaxies. We find a trend that galaxies with low stellar masses ha...

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Detalles Bibliográficos
Autores principales:	Tissera, P.B., Pedrosa, S.E., Sillero, E., Vilchez, J.M.
Formato:	JOUR
Materias:	Galaxies: abundances Galaxies: evolution Galaxy: formation
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_00358711_v456_n3_p2982_Tissera
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_00358711_v456_n3_p2982_Tissera
record_format	dspace
spelling	todo:paper_00358711_v456_n3_p2982_Tissera2023-10-03T14:47:15Z The gas metallicity gradient and the star formation activity of disc galaxies Tissera, P.B. Pedrosa, S.E. Sillero, E. Vilchez, J.M. Galaxies: abundances Galaxies: evolution Galaxy: formation We study oxygen abundance profiles of the gaseous disc components in simulated galaxies in a hierarchical universe. We analyse the disc metallicity gradients in relation to the stellar masses and star formation rates of the simulated galaxies. We find a trend that galaxies with low stellar masses have steeper metallicity gradients than galaxies with high stellar masses at z ~ 0. We also detect that the gas-phase metallicity slopes and the specific star formation rate (sSFR) of our simulated disc galaxies are consistent with recently reported observations at z ~ 0. Simulated galaxies with high stellar masses reproduce the observed relationship at all analysed red shifts and have an increasing contribution of discs with positive metallicity slopes with increasing red shift. Simulated galaxies with low stellar masses have a larger fraction of negative metallicity gradients with increasing red shift. Simulated galaxies with positive or very negative metallicity slopes exhibit disturbed morphologies and/or have a close neighbour. We analyse the evolution of the slope of the oxygen profile and sSFR for a gasrich galaxy-galaxy encounter, finding that this kind of event could generate either positive or negative gas-phase oxygen profiles depending on their state of evolution. Our results support claims that the determination of reliable metallicity gradients as a function of red shift is a key piece of information in understanding galaxy formation and setting constraints on the subgrid physics. © 2015 The Authors. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00358711_v456_n3_p2982_Tissera
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Galaxies: abundances Galaxies: evolution Galaxy: formation
spellingShingle	Galaxies: abundances Galaxies: evolution Galaxy: formation Tissera, P.B. Pedrosa, S.E. Sillero, E. Vilchez, J.M. The gas metallicity gradient and the star formation activity of disc galaxies
topic_facet	Galaxies: abundances Galaxies: evolution Galaxy: formation
description	We study oxygen abundance profiles of the gaseous disc components in simulated galaxies in a hierarchical universe. We analyse the disc metallicity gradients in relation to the stellar masses and star formation rates of the simulated galaxies. We find a trend that galaxies with low stellar masses have steeper metallicity gradients than galaxies with high stellar masses at z ~ 0. We also detect that the gas-phase metallicity slopes and the specific star formation rate (sSFR) of our simulated disc galaxies are consistent with recently reported observations at z ~ 0. Simulated galaxies with high stellar masses reproduce the observed relationship at all analysed red shifts and have an increasing contribution of discs with positive metallicity slopes with increasing red shift. Simulated galaxies with low stellar masses have a larger fraction of negative metallicity gradients with increasing red shift. Simulated galaxies with positive or very negative metallicity slopes exhibit disturbed morphologies and/or have a close neighbour. We analyse the evolution of the slope of the oxygen profile and sSFR for a gasrich galaxy-galaxy encounter, finding that this kind of event could generate either positive or negative gas-phase oxygen profiles depending on their state of evolution. Our results support claims that the determination of reliable metallicity gradients as a function of red shift is a key piece of information in understanding galaxy formation and setting constraints on the subgrid physics. © 2015 The Authors.
format	JOUR
author	Tissera, P.B. Pedrosa, S.E. Sillero, E. Vilchez, J.M.
author_facet	Tissera, P.B. Pedrosa, S.E. Sillero, E. Vilchez, J.M.
author_sort	Tissera, P.B.
title	The gas metallicity gradient and the star formation activity of disc galaxies
title_short	The gas metallicity gradient and the star formation activity of disc galaxies
title_full	The gas metallicity gradient and the star formation activity of disc galaxies
title_fullStr	The gas metallicity gradient and the star formation activity of disc galaxies
title_full_unstemmed	The gas metallicity gradient and the star formation activity of disc galaxies
title_sort	gas metallicity gradient and the star formation activity of disc galaxies
url	http://hdl.handle.net/20.500.12110/paper_00358711_v456_n3_p2982_Tissera
work_keys_str_mv	AT tisserapb thegasmetallicitygradientandthestarformationactivityofdiscgalaxies AT pedrosase thegasmetallicitygradientandthestarformationactivityofdiscgalaxies AT silleroe thegasmetallicitygradientandthestarformationactivityofdiscgalaxies AT vilchezjm thegasmetallicitygradientandthestarformationactivityofdiscgalaxies AT tisserapb gasmetallicitygradientandthestarformationactivityofdiscgalaxies AT pedrosase gasmetallicitygradientandthestarformationactivityofdiscgalaxies AT silleroe gasmetallicitygradientandthestarformationactivityofdiscgalaxies AT vilchezjm gasmetallicitygradientandthestarformationactivityofdiscgalaxies
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The gas metallicity gradient and the star formation activity of disc galaxies

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