Photometric Redshift Biases from Galaxy Evolution

  title={Photometric Redshift Biases from Galaxy Evolution},
  author={Christopher John Macdonald and Gary M. Bernstein},
  journal={Publications of the Astronomical Society of the Pacific},
Proposed cosmological surveys will make use of photometric redshifts of galaxies that are significantly fainter than any complete spectroscopic redshift surveys that exist to train the photo-z methods. We investigate the photo-z biases that result from known differences between the faint and bright populations: a rise in active galactic nucleus (AGN) activity toward higher redshift, and a metallicity difference between intrinsically luminous and faint early-type galaxies. We find that even very… Expand

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