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Paper: Photometric Redshifts and Stellar Mass Assembly in the 2-deg2 COSMOS Field
Volume: 399, Panoramic Views of Galaxy Formation and Evolution
Page: 169
Authors: Ilbert, O.; Salvato, M.; Capak, P.; Le Floc’h, E.; Aussel, H.; McCracken, H.J.; Arnouts, S.; Mobasher, B.; Sanders, D.B.; Scoville, N.; Taniguchi, Y.; the COSMOS team
Abstract: We measure the stellar mass function per type from z ∼ 0.2 out to z ∼ 2 in the 2-deg2 COSMOS field. We base our measurement on much improved photometric redshifts computed with 30 bands. Comparison of the derived photo-z with 4148 spectroscopic redshifts indicates a dispersion of σΔz/(1+z) = 0.007 at i+AB < 22.5. We measure the stellar mass function of different galaxy types based on 230,000 galaxies selected at F3.6μm > 1μJy. We observe a increase in density of the low mass ellipticals with times ; a rapid mass assembly of massive ellipticals from z = 2 out z = 1 which slows down at z < 1 ; a mild evolution of the stellar mass density for the star-forming galaxies which indicates that a significant fraction of them is transformed into quiescent galaxies.
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