Characteristics of the Flare Phenomenon in Blazar AO0235+164 in Gamma,Optical, and Radio Bands |
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| Authors: | V S Bychkova A E Volvach L N Volvach N S Kardashev M G Larionov V V Vlasyuk O I Spiridonova A Lähteenmäki M Tornikoski J Tammi E Järvelä R J C Vera W Chamani S Enestam |
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| Institution: | 1.Astro Space Center of the Lebedev Physical Institute of the Russian Academy of Sciences,Moscow,Russia;2.Department of radio astronomy and geodynamics of the Crimean Astrophysical Observatory of the Russian Academy of Sciences,Yalta,Russia;3.Institute of applied astronomy of the Russian Academy of Sciences,St. Petersburg,Russia;4.Department of radio astronomy and geodynamics of the Crimean Astrophysical Observatory of the Russian Academy of Sciences,Yalta,Russia;5.Special Astrophysical Observatory,Russian Academy of Sciences,Nizhnii Arkhyz,Russia;6.Aalto University Mets?hovi Radio Observatory,Aalto,Finland;7.Department of Electronics and Nanoengineering of the Aalto University,Aalto,Finland |
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| Abstract: | The active core of the galaxy AO0235+164 is monitored in the optical and radio bands at millimeter wavelengths. Using the multifrequency data obtained in gamma, optical and radio bands, the characteristics of its radiation in the active phase of 2015–2016 are studied. The cross-correlation method was used to determine the delays of the 2015 flare that took place in AO0235+164 in different bands. The analysis made it possible to establish that, in comparison with the previous flare phenomena, changes in the orientation of the emissions (jets) have occurred. The angle θ between the jets and the direction towards the observer has decreased by a factor of \(\sqrt 2 \), resulting in a twofold increase in the γ-factor. The obtained value γ ≈ 40 is the most extreme value ever observed in AO0235+164 over the entire span of observations. |
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