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Delving into the gas-phase of the CALIFA galaxies to trace O and N gradients

Published online by Cambridge University Press:  21 March 2017

Enrique Pérez-Montero ,
Rubén García-Benito ,
José M. Vílchez  and
the CALIFA collaboration
Enrique Pérez-Montero
Affiliation:
Instituto de Astrofísica de Andalucía - CSIC. Glorieta de la Astronomía s/n E-18008 Granada, Spain
Rubén García-Benito
Affiliation:
Instituto de Astrofísica de Andalucía - CSIC. Glorieta de la Astronomía s/n E-18008 Granada, Spain
José M. Vílchez
Affiliation:
Instituto de Astrofísica de Andalucía - CSIC. Glorieta de la Astronomía s/n E-18008 Granada, Spain
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Abstract

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We study the radial distribution of oxygen and nitrogen abundances in H ii regions in 350 galaxies observed in the CALIFA survey using the semi-empirical N-sensitive code Hii-Chi-mistry. A separate analysis of N/O when using [N ii] is justified as the dispersion in the O/H-N/O diagram is very large. In fact different O/H and N/O slope distributions and flattening in the outskirts are obtained.On the other hand there is a tight correlation between O/H and N/O when the values of the fittings at the effective radius are considered as representative of each galaxy.

Keywords

ISM: abundancesgalaxies: evolutionH ii regions
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , Symposium S321: Formation and Evolution of Galaxy Outskirts , March 2016 , pp. 251 - 253
Copyright
Copyright © International Astronomical Union 2017 

References

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