Catalog of Radio Galaxies with z>0.3. I:Construction of the Sample

TL;DR

This paper details the creation of a sample of distant radio galaxies with redshift greater than 0.3, utilizing multiple astronomical databases, and analyzes the relationship between spectral index and redshift.

Contribution

It introduces a new method for constructing a clean sample of high-redshift radio galaxies from multiple databases for statistical analysis.

Findings

Spectral index shows a regression dependence on redshift.

Sample is effectively cleaned from quasar-like objects.

Provides a foundation for future statistical studies of radio galaxies.

Abstract

The procedure of the construction of a sample of distant ($z>0.3$) radio galaxies using NED, SDSS, and CATS databases for further application in statistical tests is described. The sample is assumed to be cleaned from objects with quasar properties. Primary statistical analysis of the list is performed and the regression dependence of the spectral index on redshift is found.