The growth of mass and metallicity in bulges and disks: CALIFA perspective. (5th March 2015)

• Record Type: Journal Article
• Authors: González Delgado, R. M.; Pérez, E.; Cid Fernandes, R.; García-Benito, R.; de Amorim, A.; Sánchez, S. F.; Husemann, B.; Fernández, R. López; Cortijo, C.; Lacerda, E.; Mast, D.
• Editors: Montmerle, Thierry
• Is Part Of: Proceedings of the International Astronomical Union. Volume 10:Number H16(2012)Highlights
• Page Start: 338
• Page End: 338
• Publication Date: 2015-03-05
• Subjects: galaxies, -- stellar populations, -- structure, -- evolution; Astronomy -- Congresses; Astronomy -- Periodicals; 520
• DOI: 10.1017/S1743921314006024
• Languages: English
• ISSNs: 1743-9213

Abstract

Abstract: CALIFA (Calar Alto Legacy Integral Field Area) is a 3D spectroscopic survey of 600 nearby galaxies that we are obtaining with PPaK@3.5m at Calar Alto (Sánchez et al .2012 ; Husemann et al .2012 ). This pioneer survey is providing valuable clues on how the mass and metallicity grow in the different galactic spatial sub-components ("bulge" and "disk"). Processed through spectral synthesis techniques, CALIFA datacubes allow us to, for the first time, spatially resolve the star formation history of galaxies (Cid Fernandes et al .2012 ). The richness of this approach is already evident from the results obtained for the first ~ 100 galaxies of the sample (Pérez et al .2012 ). We have found that galaxies grow inside-out, and that the growth rate depends on a galaxy's mass. Here, we present the radial variations of physical properties sorting galaxies by their morphological type (Figure 1). We have found a good correlation between the stellar mass surface density, stellar ages and metallicities and the Hubble type, but being the the early type spirals (Sa-Sbc) the galaxies with strong negative age and metallicity gradient from the bulge to the disk.