Results of theoretical and experimental studies of solar wind and active galactic nuclei on LFVN VLBI network using S2 recording system |
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| Authors: | V G Gavrilenko M B Nechaeva A B Pushkarev I E Molotov G Tuccari A S Chebotarev Yu N Gorshenkov V A Samodurov X Hong J Quick S Dougherty S Ananthakrishnan |
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| Institution: | (1) N. I. Lobachevsky State University of Nizhny Novgorod, Nizhny Novgorod, Russia;(2) Radiophysical Research Institute, Nizhny Novgorod, Russia;(3) Central Astronomical Observatory, St. Petersburg, Russia;(4) Scientific Research institute “Crimean Astrophysical Observatory,”, Nauchny, Crimea, Ukraine;(5) Central Research Institute for Machine Building, Korolev, Moscow Region, Russia;(6) Keldysh Institute for Applied Mathematics, Moscow, Russia;(7) JSC “Vympel” Interstate Corporation, Moscow, Russia;(8) Istituto di Radioastronomia, Noto, Italia;(9) Special Design Bureau of Moscow Power Engineering Institute, Moscow, Russia;(10) Pushchino Radio Astronomy Observatory of Lebedev Physical Institute, RAS, Puschino, Russia;(11) Shanghai Astronomical Observatory, Shanghai, China;(12) Hartebeesthoek Radio Astronomy Observatory, Hartebeesthoek, South Africa;(13) Dominion Radio Astrophysical Observatory, Pentictone, Canada;(14) National Centre for Radio Astrophysics of Tata Institute of Fundamental Reseach, Pune, India |
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| Abstract: | We discuss the results of two sessions of observations at the Low-Frequency VLBI Network (LFVN), carried out in 1999 (INTAS99.4)
and 2000 (INTAS00.3) at a wavelength of 18 cm using the S2 recording system and processed using the correlator system in Pentictone,
Canada. In different configurations of the experiments on studying the solar wind and active galactic nuclei, the antennas
at the following sites were employed: Medvezhji Ozera (RT-64, Special Engineering Bureau of Moscow Power Engineering Institute,
Russia), Pushchino (RT-22, Pushchino Radio Astronomy Observatory, Russia), Hartebeesthoek (RT-25, South Africa), Noto (RT-32,
Italy), Shanghai (RT-25, China), Pune (RT-45, India), Svetloe (RT-32, Institute of Applied Astronomy RAS, Russia). The work
resulted in successful testing of the method of radio probing of the solar-wind plasma by radiation of extragalactic sources,
supplemented with the method of radio interferometric reception. Spectral analysis of the obtained data allowed us to estimate
the index of spatial spectrum of the electron number density.uctuations and the transfer velocity of the solar-wind inhomogeneities
on the sounding path. We present and discuss the retrieved images of STA-102 quasar and the BL Lacertae object 1418+546 with
millisecond angular resolution and demonstrate the results of modeling the structure of these sources.
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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 50, No. 4, pp. 275–299, April 2007 |
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