Environmental dependence of 8um luminosity functions of galaxies at z~0.8: Comparison between RXJ1716.4+6708 and the AKARI NEP deep field

Abstract

We aim to reveal environmental dependence of infrared luminosity functions (IR LFs) of galaxies at z~0.8 using the AKARI satellite. We construct restframe 8um IR LFs in the cluster region RXJ1716.4+6708 at z=0.81, and compare them with a blank field using the AKARI North Ecliptic Pole deep field data at the same redshift. AKARI's wide field of view (10'x10') is suitable to investigate wide range of galaxy environments. AKARI's 15um filter is advantageous here since it directly probes restframe 8um at z~0.8, without relying on a large extrapolation based on a SED fit, which was the largest uncertainty in previous work. We have found that cluster IR LFs at restframe 8um have a factor of 2.4 smaller L^* and a steeper faint-end slope than that of the field. Confirming this trend, we also found that faint-end slopes of the cluster LFs becomes flatter and flatter with decreasing local galaxy density. These changes in LFs cannot be explained by a simple infall of field galaxy population into a cluster. Physics that can preferentially suppress IR luminous galaxies in high density regions is required to explain the observed results.

arXiv commentAccepted for publication in A&A AKARI special issue

References in corpus (34)

• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Accurate photometric redshifts for the CFHT Legacy Survey calibrated using the VIMOS VLT Deep Survey
• The reversal of the star formation-density relation in the distant universe
• The Calibration of Mid-Infrared Star Formation Rate Indicators
• The Infrared Spectral Energy Distribution of Normal Star-Forming Galaxies: Calibration at Far-Infrared and Submillimeter Wavelengths
• The Infrared Astronomical Mission AKARI
• Galaxy Star-Formation as a Function of Environment in the Early Data Release of the Sloan Digital Sky Survey
• Determining Star Formation Rates for Infrared Galaxies
• The Morphology-Density Relation in the Sloan Digital Sky Survey
• The Mid-IR Properties of Starburst Galaxies from Spitzer-IRS Spectroscopy
• The infrared luminosity function of galaxies at redshifts z=1 and z~2 in the GOODS fields
• Modelling the infrared galaxy evolution using a phenomenological approach
• The SWIRE-VVDS-CFHTLS surveys: stellar mass assembly over the last 10 Gyears. Evidence for a major build up of the red sequence between z=2 and z=1
• The Environmental Dependence of Galaxy Properties in the Local Universe: Dependence on Luminosity, Local Density, and System Richness
• The Build-up of the Colour-Magnitude Relation as a Function of Environment
• Luminosity functions for galaxies and quasars in the Spitzer Wide-Area Infrared Extra-galactic (SWIRE) Legacy survey
• Deep Extragalactic Surveys around the Ecliptic Poles with AKARI (ASTRO-F)
• The Environment of Passive Spiral Galaxies in the SDSS
• The evolution of the ultraviolet and infrared luminosity densities in the universe at 0<z<1
• A Panoramic Halpha Imaging Survey of the z=0.4 cluster Cl0024.0+1652 with Subaru
• Evolution of Infrared Luminosity functions of Galaxies in the AKARI NEP-Deep field: Revealing the cosmic star formation history hidden by dust
• IR observations of MS 1054-03: Star Formation and its Evolution in Rich Galaxy Clusters
• Estimating the total infrared luminosity of galaxies up to z~2 from mid- and far-infrared observations
• The IR Luminosity Functions of Rich Clusters
• Mapping dusty star formation in and around a cluster at z=0.81 by wide-field imaging with AKARI
• A Spectroscopically Confirmed Excess of 24 micron Sources in a Super Galaxy Group at z=0.37: Enhanced Dusty Star Formation Relative to the Cluster and Field Environment
• Optical Properties of 4248 IRAS Galaxies
• Evolution of the Colour--Radius Relation and the Morphology--Radius Relation in the SDSS Galaxy Clusters
• The Luminosity Functions of the Galaxy Cluster MS1054-0321 at z=0.83 based on ACS Photometry
• The Environmental Dependence of Properties of Galaxies around the RDCSJ0910+54 Cluster at z=1.1
• Dependence of the Build-up of the Colour-Magnitude Relation on Cluster Richness at z ~ 0.8
• J- and Ks-band Galaxy Counts and Color Distributions in the AKARI North Ecliptic Pole Field
• Source Counts at 15 microns from the AKARI NEP Survey
• Optical Identification of 15 Micron Sources in the AKARI Performance Verification Field toward the North Ecliptic Pole

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