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Evolution of the galaxy correlation function at redshifts 0.2 < z < 3

  • Andrzej M. Sołtan (a1)

Abstract

We determine the auto-correlation function (ACF) of galaxies using massive deep galaxy surveys for which distances to individual objects are assessed using photometric redshifts. The method is applied to the 2deg COSMOS survey of ~ 300000 galaxies with i + < 25 and z ph ≲ 3. The distance estimates based on photometric redshifts are not sufficiently accurate to be directly used to determine the ACF. Nevertheless, the photometric redshifts carry statistical information on the data distribution on (very) large scales. The investigation of the surface distribution of galaxies in several redshift (=distance) bins allows us to determine the spatial (3D) ACF over the redshift range of 0.2 - 3.2 or look back time of 2.4 - 11.5 Gy.

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References

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Ilbert, O., Capak, P., Salvato, M., et al. 2009, ApJ, 690, 1236
Taniguchi, Y., Scoville, N., Murayama, T., et al. 2007, ApJS, 172, 9
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Proceedings of the International Astronomical Union
  • ISSN: 1743-9213
  • EISSN: 1743-9221
  • URL: /core/journals/proceedings-of-the-international-astronomical-union
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