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Advances in AstronomyVolume 2013 2013, Article ID 627867, 14 pages

Review ArticleInstituto Nacional de Astrofísica, Óptica y Electrónica, Luis E. Erro 1, 72840 Tonantzintla, PUE, Mexico

Received 7 August 2013; Accepted 27 September 2013

Academic Editor: José Manuel Vílchez Medina

Copyright © 2013 Fernando Fabián Rosales-Ortega. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A new generation of wide-field emission-line surveys based on integral field units IFU is allowing us to obtain spatially resolved information of the gas-phase emission in nearby late-type galaxies, based on large samples of HII regions and full two-dimensional coverage. These observations are allowing us to discover and characterise abundance differentials between galactic substructures and new scaling relations with global physical properties. Here I review some highlights of our current studies employing this technique: 1 the case study of NGC 628, the largest galaxy ever sampled with an IFU; 2 a statistical approach to the abundance gradients of spiral galaxies, which indicates a universal radial gradient for oxygen abundance; and 3 the discovery of a new scaling relation of HII regions in spiral galaxies, the local mass-metallicity relation of star-forming galaxies. The observational properties and constrains found in local galaxies using this new technique will allow us to interpret the gas-phase abundance of analogue high-z systems.

Autor: Fernando Fabián Rosales-Ortega



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