Skip to main content

Research Repository

Advanced Search

The evolution of the radial gradient of oxygen abundance in spiral galaxies

Gibson, Brad; Ascasibar, Yago; Cavichia, Oscar; Costa, Roberto Dell’Aglio Dias da; Díaz, Ángeles; Maciel, W J; Mollá, Mercedes

Authors

Yago Ascasibar

Oscar Cavichia

Roberto Dell’Aglio Dias da Costa

Ángeles Díaz

W J Maciel

Mercedes Mollá



Abstract

The aim of this work is to present our new series of chemical evolution models computed for spiral and low mass galaxies of different total masses and star formation efficiencies. We analyze the results of models, in particular the evolution of the radial gradient of oxygen abundance. Furthermore, we study the role of the infall rate and of the star formation history on the variations of this radial gradient. The relations between the O/H radial gradient and other spiral galaxies characteristics as the size or the stellar mass are also shown. We find that the radial gradient is mainly a scale effect which basically does not change with the redshift (or time) if it is measured within the optical radius. Moreover, when it is measured as a function of a normalized radius, show a similar value for all galaxies masses, showing a correlation with a dispersion around an average value which is due to the differences star formation efficiencies, in agreement with the idea of an universal O/H radial gradient.

Citation

Gibson, B., Ascasibar, Y., Cavichia, O., Costa, R. D. D. D., Díaz, Á., Maciel, W. J., & Mollá, M. (in press). The evolution of the radial gradient of oxygen abundance in spiral galaxies

Deposit Date Jun 9, 2017
Publicly Available Date
Journal Chemical abundances in gaseous nebulae
Peer Reviewed Not Peer Reviewed
Volume 12
Keywords Oxygen abundance radial gradient
Public URL https://hull-repository.worktribe.com/output/452221