Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics
Scientific paper
2010-07-12
Astronomy and Astrophysics
Astrophysics
Cosmology and Extragalactic Astrophysics
Accepted for publication in ApJ. 8 pages, 8 figures
Scientific paper
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.
Aussel Herve
Capak Peter
Feruglio Chiara
Fiore Fabrizio
Ideue Yuko
No associations
LandOfFree
Obscured star-formation and environment in the COSMOS field does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Obscured star-formation and environment in the COSMOS field, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Obscured star-formation and environment in the COSMOS field will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-696609