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CALIFA survey: The spatially resolved star formation history of massive galaxies

Published online by Cambridge University Press:  17 July 2013

Rosa González Delgado ,
Enrique Pérez ,
Roberto Cid Fernandes ,
Rubén García-Benito ,
André de Amorim ,
Sebastian F. Sánchez ,
Bernd Husemann ,
Rafael López Fernández ,
Clara Cortijo  and
Eduardo Lacerda
...Show all authors
Rosa González Delgado
Affiliation:
Instituto de Astrofísica de Andalucia, Granada, Spain
Enrique Pérez
Affiliation:
Instituto de Astrofísica de Andalucia, Granada, Spain
Roberto Cid Fernandes
Affiliation:
Instituto de Astrofísica de Andalucia, Granada, Spain Universidade Federal de Santa Catarina, Florianópolis, Brazil
Rubén García-Benito
Affiliation:
Instituto de Astrofísica de Andalucia, Granada, Spain
André de Amorim
Affiliation:
Universidade Federal de Santa Catarina, Florianópolis, Brazil
Sebastian F. Sánchez
Affiliation:
Instituto de Astrofísica de Andalucia, Granada, Spain
Bernd Husemann
Affiliation:
Leibniz-Institut fur Astrophysik, Postdam, Germany
Rafael López Fernández
Affiliation:
Instituto de Astrofísica de Andalucia, Granada, Spain
Clara Cortijo
Affiliation:
Instituto de Astrofísica de Andalucia, Granada, Spain
Eduardo Lacerda
Affiliation:
Universidade Federal de Santa Catarina, Florianópolis, Brazil
Damian Mast
Affiliation:
Instituto de Astrofísica de Andalucia, Granada, Spain
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Abstract

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The Calar Alto Legacy Integral Field Area (CALIFA) project is an ongoing 3D spectroscopic survey of 600 nearby galaxies of all kinds. This pioneer survey is providing valuable clues on how galaxies form and evolve. Processed through spectral synthesis techniques, CALIFA datacubes allow us to, for the first time, spatially resolve the star formation history of galaxies spread across the color-magnitude diagram. The richness of this approach is already evident from the results obtained for the first ~ 1/6 of the sample. Here we show how the different galactic spatial sub-components (“bulge” and “disk”) grow their stellar mass over time. We explore the results stacking galaxies in mass bins, finding that, except at the lowest masses, galaxies grow inside-out, and that the growth rate depends on a galaxy's mass. The growth rate of inner and outer regions differ maximally at intermediate masses. We also find a good correlation between the age radial gradient and the stellar mass density, suggesting that the local density is a main driver of galaxy evolution.

Keywords

galaxiesstellar populationsstructureevolution
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S295: The intriguing life of massive galaxies , August 2012 , pp. 300 - 303
Copyright
Copyright © International Astronomical Union 2013 

References

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