The Planck catalogue – parameters of AGN variability at millimeter wavelengths

  • А.Е. Вольвач Crimean Astrophysical Observatory, Nauchny, 298409
  • М.Г. Ларионов Астрокосмический центр Физического института им. П.Н. Лебедева Российской академии наук, Москва, Россия
  • Л.Н. Вольвач Crimean Astrophysical Observatory, Nauchny, 298409

Abstract

Observations of the full sample of 104 bright active galactic nuclei from the Planck catalogue have been carried out with the RT-22 radio telescope (CrAO) at a frequency of 36.8 GHz. All 104 sources from the analyzed list have fluxes at 36.8 GHz more than 1 Jy and these are the known objects recorded in the catalogues of radio sources. The obtained observation data prove the conclusions that the level of flux density variability of AGN emission is maximal at millimeter wavelengths compared to other frequencies in the radio range. Variations in variability index of AGN presumably occur due to the systematic increase in spectral density of their emission as a result of transition to the infrared wavelength range. Variations in variability index of AGN in millimeter wavelengths are not in contrast to the assumption that the flux variability is caused by inner reasons in binary systems from supermassive black holes that are at the evolution stage close to merging.

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Published
2018-05-31
How to Cite
Вольвач А., Ларионов М., Вольвач Л., 2018. Izvestiya Krymskoi Astrofizicheskoi Observatorii, vol. 114, no. 2, pp. 55-59. DOI: 10.31059/izcrao-vol114-iss2-pp55-59
Section
Сonference proceedings