Angular Size-Redshift: Experiment and Calculation

TL;DR

This study investigates the angular size-redshift relation using radio sources, showing that anisotropic morphology explains Euclidean behavior without requiring size evolution, aligning observations with cosmological models.

Contribution

It demonstrates experimentally that anisotropic morphology accounts for Euclidean behavior in the angular size-redshift test without assuming size evolution.

Findings

Agreement between experiment and calculation in Lambda CDM and Friedman models

Anisotropic morphology explains Euclidean behavior without size evolution

A new catalogue of radio sources was compiled for the test

Abstract

In this paper the next attempt is made to clarify the nature of the Euclidean behavior of the boundary in the angular size-redshift cosmological test. It is shown experimentally that this can be explained by the selection determined by anisotropic morphology and anisotropic radiation of extended radio sources. A catalogue of extended radio sources with minimal flux densities of about 0.01 Jy at 1.4 GHz was compiled for conducting the test. Without the assumption of their size evolution, the agreement between the experiment and calculation was obtained both in the Lambda CDM model (Omega_m=0.27 , Omega_v=0.73.) and the Friedman model (Omega = 0.1 ).