Stellar mass functions of galaxies at 4<z<7 from an IRAC-selected sample in COSMOS/UltraVISTA: limits on the abundance of very massive galaxies

Abstract

We build a Spitzer IRAC complete catalog of objects, obtained by complementing the $K_{\mathrm{s}}$-band selected UltraVISTA catalog with objects detected in IRAC only. With the aim of identifying massive (i.e., $\log (M_{\ast }/M_{\odot })>11$) galaxies at $4<z<7$, we consider the systematic effects on the measured photometric redshifts from the introduction of an old and dusty SED template and from the introduction of a bayesian prior taking into account the brightness of the objects, as well as the systematic effects from different star formation histories (SFHs) and from nebular emission lines in the recovery of stellar population parameters. We show that our results are most affected by the bayesian luminosity prior, while nebular emission lines and SFHs only introduce a small dispersion in the measurements. Specifically, the number of $4<z<7$ galaxies ranges from 52 to 382 depending on the adopted configuration. Using these results we investigate, for the first time, the evolution of the massive end of the stellar mass functions (SMFs) at $4<z<7$. Given the rarity of very massive galaxies in the early universe, major contributions to the total error budget come from cosmic variance and poisson noise. The SMF obtained without the introduction of the bayesian luminosity prior does not show any evolution from $z\sim 6.5$ to $z\sim 3.5$, implying that massive galaxies could already be present when the Universe was $\sim 0.9$~Gyr old. However, the introduction of the bayesian luminosity prior reduces the number of $z>4$ galaxies with best fit masses $\log (M_{\ast }/M_{\odot })>11$ by 83%, implying a rapid growth of very massive galaxies in the first 1.5 Gyr of cosmic history. From the stellar-mass complete sample, we identify one candidate of a very massive ($\log (M_{\ast }/M_{\odot })\sim 11.5$), quiescent galaxy at $z\sim 5.4$, with MIPS $24\mu$m detection suggesting the presence of a powerful obscured AGN.

23 pages, 18 figures. ApJ accepted

References in corpus (18)

• The Cosmic Evolution Survey (COSMOS) -- Overview
• EAZY: A Fast, Public Photometric Redshift Code
• An ultra-deep near-infrared spectrum of a compact quiescent galaxy at z=2.2
• UltraVISTA: a new ultra-deep near-infrared survey in COSMOS
• A primer on hierarchical galaxy formation: the semi-analytical approach
• The Chandra COSMOS Survey, I: Overview and Point Source Catalog
• The Galaxy Mass Function up to z=4 in the GOODS-MUSIC sample: into the epoch of formation of massive galaxies
• The Cosmic Evolution Survey (COSMOS): Subaru Observations of the HST COSMOS Field
• The XMM-Newton wide-field survey in the COSMOS field: I. Survey description
• The VLA-COSMOS Survey: II. Source Catalog of the Large Project
• The XMM-Newton wide-field survey in the COSMOS field. The point-like X-ray source catalogue
• The luminosity function, halo masses and stellar masses of luminous Lyman-break galaxies at redshifts 5<z<6
• A Geometrically Supported $z\sim 10$ Candidate Multiply-Imaged by the Hubble Frontier Fields Cluster Abell 2744
• The evolution of the specific star formation rate of massive galaxies to z ~ 1.8 in the E-CDFS
• A Population of Massive and Evolved Galaxies at z$\ga$5
• A systematic search for very massive galaxies at z > 4
• The discovery of a significant sample of massive galaxies at redshifts 5 < z < 6 in the UKIDSS Ultra Deep Survey Early Data Release
• Redshift evolution of the dynamical properties of massive galaxies from SDSS-III/BOSS

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