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Evolutionary features of the variations in the fluxes of selected extragalactic radio sources at 102 MHz, 22 GHz and 36 GHz

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Abstract:

Observations of galactic and extragalactic radio sources have been made at the DKR-1000 radio telescope at 102 MHz and at the 22 m Crimean Astrophysical Observatory radio telescope at 22 and 36 GHz. Here, the results of observations of six sources are presented. Time series analysis of the sources reveals quasiperiodic flux variability with timescales from 5 to 8 years. Variations are probably connected with the global evolution of the sources. A new outburst in the 3C 454.3 source, which started in May 2005 at 36 GHz was found. The variability of 3C 454.3 was found to be cyclic, with a mean period of 6.6 years at 22 and 36 GHz.

Keywords: Evolution of flux variability; Extragalactic radio sources

Document Type: Research Article

DOI: http://dx.doi.org/10.1080/10556790500516193

Affiliations: 1: Radio Astronomy Laboratory of the Scientific Research Institutes, Crimean Astrophysical Observatory RT-22 Katsively, Yalta, 98688, Ukraine 2: Odessa Observatory, Radioastronomical Institute, Ukraineian National Academy of Sciences, Pushkinskay 37, Odessa, 65011, Ukraine

Publication date: October 1, 2005

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