Classical cosmological tests for galaxies of the Hubble Ultra Deep Field |
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Authors: | N V Nabokov Yu V Baryshev |
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Institution: | (1) Sobolev Astronomical Institute, St. Petersburg State University, Staryj Peterhoff, St. Petersburg, 198504, Russia |
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Abstract: | Images of the Hubble Ultra Deep Field are analyzed to obtain a catalog of galaxies for which the angular sizes, surface brightness, photometric redshifts, and absolute magnitudes are found. The catalog contains a total of about 4000 galaxies identified at a high signal-to-noise ratio, which allows the cosmological relations angular size—redshift and surface brightness-redshift to be analyzed. The parameters of the evolution of linear sizes and surface brightness of distant galaxies in the redshift interval 0.5–6.5 are estimated in terms of a grid of cosmological models with different density parameters (Ω V ; Ω m ). The distribution of photometric redshifts of galaxies is analyzed and possible superlarge inhomogeneities in the radial distribution of galaxies are found with scale lengths as large as 2000 Mpc. |
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