Method for analyzing the spatial distribution of galaxies on gigaparsec scales. II. Application to a grid of the HUDF-FDF-COSMOS-HDF surveys |
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| Authors: | N V Nabokov Yu V Baryshev |
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| Institution: | 1.Institute of Astronomy,St. Petersburg State University,St. Petersburg,Russia |
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| Abstract: | The initial principles of a method for analyzing the spatial distribution of visible matter in the universe with structures
on size scales of thousands of Mpc are discussed. This method is based on analyzing the distribution N(z) of the photometric
redshifts of galaxies in deep fields using large bins Δ z=0.1–0.3. Fluctuations in the numbers of galaxies in these bins in
terms of redshifts are caused by Poisson noise, correlated structures, and systematic errors in estimating photo-z. This method
involves covering a sufficiently large region of the celestial sphere with a grid of deep multi-band surveys with a cell size
on the order of 10o×10o, with deep fields of size ∼10'×10' observed with 3-10 meter telescopes at its nodes. The distribution
of the photometric redshifts of the galaxies within each deep field will yield information on the radial extent of superlarge
structures, while comparing the radial distributions in neighboring fields will yield information on the tangential extent
of these structures. A necessary element of this method is an analysis of possible distortions in the radial distributions
of the galaxies associated with the technique for evaluating the photometric redshifts. |
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