Classical Cosmological Tests for Galaxies of the Hubble Ultra Deep Field

TL;DR

This study uses the Hubble Ultra Deep Field to analyze galaxy properties and test cosmological models, revealing galaxy evolution and large-scale inhomogeneities in the universe.

Contribution

It provides a comprehensive catalog of ~4000 galaxies with detailed measurements, enabling classical cosmological tests and analysis of galaxy evolution over a wide redshift range.

Findings

Estimated evolution of galaxy sizes and surface brightness with redshift.

Identified superlarge inhomogeneities in galaxy distribution.

Analyzed the distribution of photometric redshifts for large-scale structure insights.

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. 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.