Large Structures and Galaxy Evolution in COSMOS at z < 1.1

Abstract

We present the first identification of large-scale structures (LSS) at z $<1.1$ in the Cosmic Evolution Survey (COSMOS). The structures are identified from adaptive smoothing of galaxy counts in the pseudo-3d space ($\alpha ,\delta$,z) using the COSMOS photometric redshift catalog. The technique is tested on a simulation including galaxies distributed in model clusters and a field galaxy population -- recovering structures on all scales from 1 to 20\arcmin without {\it a priori} assumptions for the structure size or density profile. Our procedure makes {\bf no} {\it a priori} selection on galaxy spectral energy distribution (SED, for example the Red Sequence), enabling an unbiased investigation of environmental effects on galaxy evolution. The COSMOS photometric redshift catalog yields a sample of $1.5\times 10^5$ galaxies with redshift accuracy, $\Delta z_{FWHM}/(1+z)\le 0.1$ at z $<1.1$ down to I${}_{AB}\le 25$ mag. Using this sample of galaxies, we identify 42 large-scale structures and clusters. abstract truncated for astroph 25 line limit -- see preprint

72 pages with 29 pages of figures, for cosmos apj suppl special issue

References in corpus (10)

• The Cosmic Evolution Survey (COSMOS) -- Overview
• zCOSMOS: A Large VLT/VIMOS redshift survey covering 0 < z < 3 in the COSMOS field
• The Cosmic Evolution Survey (COSMOS): Subaru Observations of the HST COSMOS Field
• The XMM-Newton wide-field survey in the COSMOS field: VI. Statistical properties of clusters of galaxies
• COSMOS: 3D weak lensing and the growth of structure
• Photometric Redshifts of Galaxies in COSMOS
• The effects of environment on morphological evolution between 0<z<1.2 in the COSMOS Survey
• The Cosmic Evolution Survey (COSMOS): a large-scale structure at z=0.73 and the relation of galaxy morphologies to local environment
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Cited by in corpus (29)

• The Cosmic Evolution Survey (COSMOS) -- Overview
• zCOSMOS: A Large VLT/VIMOS redshift survey covering 0 < z < 3 in the COSMOS field
• The Chandra COSMOS Survey, I: Overview and Point Source Catalog
• Photometric redshift and classification for the XMM-COSMOS sources
• The Cosmic Evolution Survey (COSMOS): Subaru Observations of the HST COSMOS Field
• Stellar and total baryon mass fractions in groups and clusters since redshift 1
• The XMM-Newton wide-field survey in the COSMOS field: VI. Statistical properties of clusters of galaxies
• AzTEC Millimetre Survey of the COSMOS Field: I. Data Reduction and Source Catalogue
• Photometric Redshifts of Galaxies in COSMOS
• A new method to separate star forming from AGN galaxies at intermediate redshift: The submillijansky radio population in the VLA-COSMOS survey
• First catalog of strong lens candidates in the COSMOS field
• The redshift evolution of early-type galaxies in COSMOS: Do massive early-type galaxies form by dry mergers?
• The effects of environment on morphological evolution between 0<z<1.2 in the COSMOS Survey
• The Gemini Deep Deep Survey: VIII. When Did Early-type Galaxies Form?
• The dust un-biased cosmic star formation history from the 20 cm VLA-COSMOS survey
• Spectroscopy of clusters in the ESO distant cluster survey (EDisCS).II. Redshifts, velocity dispersions, and substructure for clusters in the last 15 fields
• The Cosmic Evolution Survey (COSMOS): a large-scale structure at z=0.73 and the relation of galaxy morphologies to local environment
• The Complex Structure of the Cl 1604 Supercluster at z~0.9
• The angular correlations of galaxies in the COSMOS field
• AzTEC Millimetre Survey of the COSMOS Field - II. Source Count Overdensity and Correlations with Large-Scale Structure
• A wide angle tail radio galaxy in the COSMOS field: evidence for cluster formation
• Relation Between Stellar Mass and Star Formation Activity in Galaxies
• The Environment of Galaxies at Low Redshift
• A Photometrically Detected Forming Cluster of Galaxies at Redshift 1.6 in the GOODS Field
• Environmental Effects on the Star Formation Activity in Galaxies at z=1.2 in the COSMOS Field
• Higher-Order Angular Galaxy Correlations in the SDSS: Redshift and Color Dependence of non-Linear Bias
• The VIMOS VLT Deep Survey: Testing the gravitational instability paradigm at z ~ 1
• Studying Large and Small Scale Environments of Ultraviolet Luminous Galaxies
• Evolution of the Frequency of Luminous (\geq L_V*) Close Galaxy Pairs at z < 1.2 in the COSMOS Field