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Paper: Quantifying Downsizing and Its Origin: the Mass Assembly of Galaxies and the Role of AGN
Volume: 408, The Starburst−AGN Connection
Page: 384
Authors: Pérez-González, P.G.; Alonso-Herrero, A.; Barro, G.; Rieke, G.; Donley, J.; Gallego, J.; Zamorano, J.
Abstract: We present our latest results based on the Spitzer Cosmological Surveys about the characterization of the mass assembly of galaxies in the last 12 Gyr. We have analyzed the stellar mass function up to z=4 using a sample of galaxies selected in the rest-frame near-infrared with Spitzer/IRAC, and the SFR function using MIPS data. Our results confirm and quantify the “downsizing” scenario of galaxy formation. We have also analyzed the role of X-ray emitting AGN in the downsizing process. We do not find strong evidences in AGN host galaxies for either highly suppressed star formation, expected if AGN played a role in quenching star formation, or elevated star formation when compared to mass selected galaxies of similar stellar masses and redshifts.
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