%0 Journal Article
%T Mass assembly in quiescent and star-forming galaxies since z=4 from UltraVISTA
%A O. Ilbert
%A H. J. McCracken
%A O. Le Fevre
%A P. Capak
%A J. Dunlop
%A A. Karim
%A M. A. Renzini
%A K. Caputi
%A S. Boissier
%A S. Arnouts
%A H. Aussel
%A J. Comparat
%A Q. Guo
%A P. Hudelot
%A J. Kartaltepe
%A J. P. Kneib
%A J. K. Krogager
%A E. Le Floc'h
%A S. Lilly
%A Y. Mellier
%A B. Milvang-Jensen
%A T. Moutard
%A M. Onodera
%A J. Richard
%A M. Salvato
%A D. B. Sanders
%A N. Scoville
%A J. Silverman
%A Y. Taniguchi
%A L. Tasca
%A R. Thomas
%A S. Toft
%A L. Tresse
%A D. Vergani
%A M. Wolk
%A A. Zirm
%J Physics
%D 2013
%I arXiv
%R 10.1051/0004-6361/201321100
%X We estimate the galaxy stellar mass function and stellar mass density for star-forming and quiescent galaxies with 0.2<z<4. We construct a deep K<24 sample of 220000 galaxies selected using the UltraVISTA DR1 data release. Our analysis is based on precise 30-band photometric redshifts. By comparing these photometric redshifts with 10800 spectroscopic redshifts from the zCOSMOS bright and faint surveys, we find a precision of sigma(dz/(1+z))=0.008 at i<22.5 and sigma(dz/(1+zs))=0.03 at 1.5<z<4. We derive the stellar mass function and correct for the Eddington bias. We find a mass-dependent evolution of the global and star-forming populations. This mass-dependent evolution is a direct consequence of the star formation being quenched in galaxies more massive than M>10^10.7Msun. For the mass function of the quiescent galaxies, we do not find any significant evolution of the high-mass end at z<1; however we observe a clear flattening of the faint-end slope. From z~3 to z~1, the density of quiescent galaxies increases over the entire mass range. Their comoving stellar mass density increases by 1.6 dex between z~3 and z~1 and by less than 0.2dex at z<1. We infer the star formation history from the mass density evolution and we find an excellent agreement with instantaneous star formation rate measurements at z<1.5, while we find differences of 0.2dex at z>1.5 consistent with the expected uncertainties. We also develop a new method to infer the specific star formation rate from the mass function of star-forming galaxies. We find that the specific star formation rate of 10^10Msun galaxies increases continuously in the redshift range 1<z<4. Finally, we compare our results with a semi-analytical model and find that these models overestimate the density of low mass quiescent galaxies by an order of magnitude, while the density of low-mass star-forming galaxies is successfully reproduced.
%U http://arxiv.org/abs/1301.3157v3