Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics
Scientific paper
2011-01-04
Astronomy and Astrophysics
Astrophysics
Cosmology and Extragalactic Astrophysics
Accepted for publication in MNRAS. The paper contains 9 pages, 11 figures and 1 table
Scientific paper
We present a study of galaxy environments to z~2, based on a sample of over 33,000 K-band selected galaxies detected in the UKIDSS Ultra Deep Survey (UDS). The combination of infrared depth and area in the UDS allows us to extend previous studies of galaxy environment to z>1 without the strong biases associated with optical galaxy selection. We study the environments of galaxies divided by rest frame (U-B) colours, in addition to `passive' and `star-forming' subsets based on template fitting. We find that galaxy colour is strongly correlated with galaxy overdensity on small scales (<1Mpc diameter), with red/passive galaxies residing in significantly denser environments than blue/star-forming galaxies to z~1.5. On smaller scales (<0.5Mpc diameter) we also find a relationship between galaxy luminosity and environment, with the most luminous blue galaxies at z~1 inhabiting environments comparable to red, passive systems at the same redshift. Monte Carlo simulations demonstrate that these conclusions are robust to the uncertainties introduced by photometric redshift errors.
Almaini Omar
Bradshaw E. J.
Chuter Robert W.
Cirasuolo Michele
Conselice Christopher J.
No associations
LandOfFree
Galaxy Environments in the UKIDSS Ultra Deep Survey (UDS) 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 Galaxy Environments in the UKIDSS Ultra Deep Survey (UDS), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Galaxy Environments in the UKIDSS Ultra Deep Survey (UDS) will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-265856