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The nature of active galaxies based on their radio properties
Author(s) -
Abrahamyan Hayk V.
Publication year - 2020
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.202013701
Subject(s) - radio galaxy , physics , astrophysics , active galactic nucleus , galaxy , x shaped radio galaxy , luminous infrared galaxy , radio spectrum , astronomy
In this paper, we investigate radio properties of active galaxies taken from the reference [Véron‐Cetty & Véron (2010)] catalog. The galaxies are limited to magnitudes in the range of 12 m − 19 m . We have cross‐correlated the list with radio catalogs and selected those galaxies that have data on six or more radio fluxes at different wavelengths. As a result, we have 198 galaxies that satisfy these conditions. Using SDSS DR15, we have obtained 96 spectroscopic identifications of the 198 objects. After the classification, 85% of the 96 objects have changed their types. Available data on the classification of these objects and our classification showed that 56.7% of them are Seyfert galaxies. For all the objects, we have built radio spectra and estimated radio spectral indices. As a result, we obtainα ‾ = − 0.6089 ± 0.056 ( α ‾ Seyfert = − 0.6013 ± 0.027 ,α ‾ LINER = − 0.5955 ± 0.025 ,α ‾ HII = − 0.6672 ± 0.039 ,α ‾ Comp . = − 0.7128 ± 0.043 ). We discuss the radio properties of active galaxies based on their radio spectral indices.