Variations in the integral fluxes and structure of the radio source 3C120 |
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Authors: | A E Volvach A B Pushkarev M G Larionov L N Volvach H D Aller M F Aller |
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Institution: | (1) Radio Astronomy Laboratory, Scientific Research Institute Crimean Astrophysical Observatory (CrAO), Ukraine;(2) Main (Pulkovo) Astronomical Observatory, St. Petersburg, Russia;(3) Astro-space Center, P. N. Lebedev Physics Institute, Russian Academy of Sciences, Russia;(4) Radio Observatory, University of Michigan, USA |
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Abstract: | The variability of the radio source 3C120 is studied using data from the international geodesic VLBI observation programs
at 8.6 GHz and regular monitoring over frequencies of 4.8–36.8 GHz carried out at the Crimean Astrophysical Observatory (Ukraine)
and the Radio Astronomy Observatory of the University of Michigan (USA). A combined analysis of the integral fluxes and structures
on millisecond scales reveals the existence of flares at high frequencies accompanied by the appearance of new VLBI components
at centimeter wavelengths. It is found that the variations in the fluxes for 3C120 at various radio frequencies have delayed
maxima at low frequencies, and the flare of 1998 was accompanied by the birth of a new superluminal component.
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Translated from Astrofizika, Vol. 50, No. 3, pp. 325–334 (August 2007). |
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Keywords: | radio observations— individual object 3C120 |
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