A hole in the sky - The dependence of the galaxy luminosity function on the environment
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We have developed a method to calculate overdensities in multicolour surveys, and compare the local density contrast measured in galaxy samples with different redshift error distributions. We calculated overdensities for three COMBO-17 fields, and identified a region in the CDFS, where the density is lower by a factor of 2 compared to the other two fields. This is mainly due to a deficiency of faint red galaxies. This result is in agreement with local observations in the 2dF.
To appear in the ASP Conference Series (Proceedings of the Cosmic Frontiers conference held in Durham, 31st July - 4th August 2006)
To appear in the ASP Conference Series (Proceedings of the Cosmic Frontiers conference held in Durham, 31st July - 4th August 2006)