GMASS Ultradeep Spectroscopy of Galaxies at z~2. III: The emergence of the color bimodality at z~2 - AstrophysicsReport as inadecuate




GMASS Ultradeep Spectroscopy of Galaxies at z~2. III: The emergence of the color bimodality at z~2 - Astrophysics - Download this document for free, or read online. Document in PDF available to download.

Abstract: The aim of this work is to study the evolution of the rest frame colordistribution of galaxies with the redshift, in particular in the criticalinterval 1.410.1, and we study their morphological andspectro-photometric properties. We show that the contribution to this sample ofearly-type galaxies, defined as galaxies with a spheroidal morphology and nostar formation, decreases from 60-70% at z<0.5 down to ~50% at redshift z=2. Atz>2 we still find red galaxies in the mass complete sample, even if thebimodality is not seen any more. About 25% of these red galaxies at z>2 arepassively evolving, with the bulk of their stars formed at redshift z>`3.



Author: P. Cassata, A. Cimatti, J. Kurk, G. Rodighiero, L. Pozzetti, M. Bolzonella, E. Daddi, M. Mignoli, S. Berta, M. Dickinson, A. Fran

Source: https://arxiv.org/







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