The effect of environment on the formation and evolution of galaxies in the distant universe
Chuter, Robert W. (2011) The effect of environment on the formation and evolution of galaxies in the distant universe. PhD thesis, University of Nottingham.
In this thesis I primarily use the UKIDSS Ultra-Deep Survey (UDS) to investigate the effect environment has on galaxies across the redshift range 0.25 < z < 3.25. The UDS is a K-selected survey so it does not suffer from the strong iases that affect optical surveys at high redshift (z > 1). The combination of a large contiguous area (0.77 deg2) and depth (KAB ∼24) allows us to study a range of environments up to a redshift of z ∼3. Due to the multiwavelength coverage we are able to obtain reliable photometric redshifts which are necessary for studies of environment. I utilise progressive releases of the UDS data to study the effect environment has on the rest frame (U-B) colour of galaxies. Using the U-B colour and absolute K-band magnitude I was able to divide our galaxies into red and blue and study their average environments. In this thesis I also employ data from the spaced based, GOODS NICMOS Survey (GNS) to help study the environments out to high redshift (z ∼3), in which I also study the colour-density relation.
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