Obscured star-formation and environment in the COSMOS field

Abstract

We investigate the effects of the environment on star-formation in a sample of massive luminous and ultra-luminous infrared galaxies (LIRGs and ULIRGs) with S(24 micron)>80 uJy and i+<24 in the COSMOS field. We exploit the accurate photometric redshifts in COSMOS to characterize the galaxy environment and study the evolution of the fraction of LIRGs and ULIRGs in different environments in the redshift range z=0.3-1.2 and in bins of stellar mass. We find that the environment plays a role in the star formation processes and evolution of LIRGs and ULIRGs. We find an overall increase of the ULIRG+LIRG fraction in an optically-selected sample with increasing redshift, as expected from the evolution of the star formation rate density. We find that the ULIRG+LIRG fraction decreases with increasing density up to z~1, and that the dependence on density flattens with increasing redshift. We do not observe the reversal of the star-formation rate density relation up to z=1 in massive LIRGs and ULIRGs, suggesting that such reversal might occur at higher redshift in this infrared luminosity range.

Accepted for publication in ApJ. 8 pages, 8 figures

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Cited by in corpus (22)

• Cool Gas in High Redshift Galaxies
• On the evolution and environmental dependence of the star formation rate versus stellar mass relation since z~2
• The dependence of star formation activity on environment and stellar mass at z~1 from the HiZELS H-alpha survey
• Galaxies in X-ray Groups I: Robust Membership Assignment and the Impact of Group Environments on Quenching
• Cosmic Web and Star Formation Activity in Galaxies at z~1
• The Subaru COSMOS 20: Subaru Optical Imaging of the HST COSMOS Field with 20 Filters
• The redshift-evolution of the distribution of star formation among dark matter halos as seen in the infrared
• Environmental Dependence of Local Luminous Infrared Galaxies
• The Chandra-COSMOS survey IV: X-ray spectra of the bright sample
• The effect of environment on star forming galaxies at redshift 1 - First insight from PACS
• GOODS-Herschel: the impact of galaxy-galaxy interactions on the far-infrared properties of galaxies
• Reversal or no reversal: the evolution of the star formation rate-density relation up to z~1.6
• The evolution of galaxy star formation activity in massive halos
• PRIMUS: Obscured Star Formation on the Red Sequence
• Locating Star-Forming Regions in Quasar Host Galaxies
• The Role of Galaxy Interaction in Environmental Dependence of the Star Formation Activity at z~1.2
• Morphology & Environment's Role on the Star Formation Rate -- Stellar Mass Relation in COSMOS from 0 < z < 3.5
• {\em Herschel}-ATLAS/GAMA: The Environmental Density of Far-Infrared Bright Galaxies at $z\le 0.5$
• A Fully-Identified Sample of AEGIS20 Microjansky Radio Sources
• The Environments of Local Luminous Infrared Galaxies: Star Formation Rates increase with Density
• What size halos do local LIRGs live in?
• ALMA survey of a massive node of the Cosmic Web at $z\sim 3$. II. A dynamically cold and massive disk galaxy in the proximity of a hyperluminous quasar