Galaxy Counts

Galaxy Counts and Redshift Distributions

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Model Counts:
A comparison of the predicted number counts of our adopted models of the galaxy luminosity function with observational data.

Galaxy number counts in our two models compared with observational data. The solid line corresponds to our standard model in which luminosity evolution cancels the k-corrections. The dashed line correspondence to the less extreme model in which k-corrections are larger than the luminosity evolution.

Model Redshift distributions:

The model galaxy redshift distributions. These distributions are weakly dependent on cosmology and are plotted here for Omega=1. The heavy (red) curves correspond to the magnitude limit of B_J<19.45 of the 2dF survey and light (blue) lines to the B_J<18.9 of the SDSS. The solid curves are for our standard selection function and the dashed curve for the alternative model with weaker luminosity evolution. The median redshifts are z=0.134 and 0.121 for the 2dF catalogues and z=0.11 and 0.1 for the SDSS catalogues.