On the Spectral Index of Distant Radio Galaxies

Details On the Spectral Index of Distant Radio Galaxies On the Spectral Index of Distant Radio Galaxies

2010-03-02

arxiv.org/abs/1003.0577v1

Astronomy Letters, 2010, V. 36, No. 1, 7

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

7 pages,5 figures

Scientific paper

10.1134/S1063773710010020

The problems of using the spectral index of radio galaxies in various tests, in particular, in selecting distant radio sources are considered. The history of the question of choosing a criterion of searching for distant radio galaxies based on the spectral index is presented. For a new catalog of 2442 radio galaxies constructed from NED, SDSS, and CATS data, an analytical form of the sp ectral index.redshift relation has been determined for the first time. The spectral index.angular size and spectral index.flux density diagrams have also been constructed. Peculiarities of the distribution of sources on these diagrams are discussed.

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