Clustering of star-forming galaxies detected in mid-infrared with the Spitzer wide-area survey

Abstract

We discuss the clustering properties of galaxies with signs of ongoing star formation detected by the Spitzer Space Telescope at 24mum band in the SWIRE Lockman Hole field. The sample of mid-IR-selected galaxies includes ~20,000 objects detected above a flux threshold of S24mum=310muJy. We adopt optical/near-IR color selection criteria to split the sample into the lower-redshift and higher-redshift galaxy populations. We measure the angular correlation function on scales of theta=0.01-3.5 deg, from which, using the Limber inversion along with the redshift distribution established for similarly selected source populations in the GOODS fields (Rodighiero et al. 2010), we obtain comoving correlation lengths of r0=4.98+-0.28 h^-1 Mpc and r0 =8.04+-0.69 h^-1 Mpc for the low-z (<z>=0.7) and high-z (<z>=1.7) subsamples, respectively. Comparing these measurements with the correlation functions of dark matter halos identified in the Bolshoi cosmological simulation (Klypin et al. 2011}, we find that the high-redshift objects reside in progressively more massive halos reaching Mtot>3e12 h^-1 Msun, compared to Mtot>7e11 h^-1 Msun for the low-redshift population. Approximate estimates of the IR luminosities based on the catalogs of 24mum sources in the GOODS fields show that our high-z subsample represents a population of "distant ULIRGs" with LIR>10^12Lsun, while the low-z subsample mainly consists of "LIRGs", LIR~10^11Lsun. The comparison of number density of the 24mum selected galaxies and of dark matter halos with derived minimum mass Mtot shows that only 20% of such halos may host star-forming galaxies.

15 pages, 12 figures

References in corpus (25)

• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• COSMOS Photometric Redshifts with 30-bands for 2-deg2
• The Cosmic Infrared Background Resolved by Spitzer. Contributions of Mid-Infrared Galaxies to the Far-Infrared Background
• The GOODS-MUSIC sample: a multicolour catalog of near-IR selected galaxies in the GOODS-South field
• A Significant Population of Very Luminous Dust-Obscured Galaxies at Redshift z ~ 2
• The 2dF-SDSS LRG and QSO Survey: The LRG 2-Point Correlation Function and Redshift-Space Distortions
• Photometric redshifts in the SWIRE Survey
• The nature of star formation in distant ultraluminous infrared galaxies selected in a remarkably narrow redshift range
• Clustering of K-selected Galaxies at 2<z<3.5: Evidence for a Color-Density Relation
• The Varied Fates of z~2 Star-forming Galaxies
• A combined re-analysis of existing blank-field SCUBA surveys: comparative 850-micron source lists, combined number counts, and evidence for strong clustering of the bright sub-mm galaxy population
• A Confirmation of the Strong Clustering of Distant Red Galaxies at 2 < z <3
• IRS Spectroscopy and Multi-wavelength Study of Luminous Star-forming Galaxies at z~1.9
• Galaxy Counts at 24 Microns in the SWIRE Fields
• Resolving the Galactic X-ray background
• A highly obscured and strongly clustered galaxy population discovered with the Spitzer Space Telescope
• On the evolution of clustering of 24um-selected galaxies
• MAMBO 1.2mm observations of luminous starbursts at z~2 in the SWIRE fields
• The spatial clustering of mid-IR selected star forming galaxies at z ~ 1 in the GOODS fields
• Redshift Distribution of Extragalactic 24 micron Sources
• VVDS-SWIRE: Clustering evolution from a spectroscopic sample of galaxies with redshift 0.2<z<2.1 selected from Spitzer IRAC 3.6 micron and 4.5 micron photometry
• The contribution of very massive high-redshift SWIRE galaxies to the stellar mass function
• Multi-wavelength properties of Spitzer-selected starbursts at z~2
• The ESO-Spitzer Imaging extragalactic Survey (ESIS) II: VIMOS I,z wide field imaging of ELAIS-S1 and selection of distant massive galaxies
• Clustering of galaxies at 3.6 microns in the Spitzer Wide-area Infrared Extragalactic legacy survey

Cited by in corpus (9)

• The clustering and bias of radio-selected AGN and star-forming galaxies in the COSMOS field
• The Properties of Radio Galaxies and the Effect of Environment in Large Scale Structures at $z\sim 1$
• SCUBA-2 Ultra Deep Imaging EAO Survey (STUDIES) IV: Spatial clustering and halo masses of 450-$\mu$m-selected sub-millimeter galaxies
• Characterising the signatures of star-forming galaxies in the extra-galactic $\gamma$-ray background
• The Clustering and Halo Masses of Star Forming Galaxies at z<1
• The study of the angular and spatial distribution of radio selected AGNs and star-forming galaxies in the ELAIS N1 field
• A study on the Clustering Properties of Radio-Selected sources in the Lockman Hole Region at 325 MHz
• The Spitzer Extragalactic Representative Volume Survey and DeepDrill extension: clustering of near-infrared galaxies
• Hosts and environments: a (large-scale) radio history of AGN and star-forming galaxies