Abstract The results of observations of interplanetary scintillations of a statistical ensemble of radio sources in the period of 2007–2011 are presented. Observation were carried out in the monitoring regime with the BSA LPI radio telescope at the frequency 111 MHz. Fluctuations of radio emission flux of all sources (a few hundred in total) were recorded 24 hours a day. Those sources were investigated, which had a scintillating flux greater than 0.2 Jy and fell within the sky band of 8° width in declination, corresponding to radio telescope’s 16-beam system. The statistical ensemble of radio sources is characterized by the mean variance of a scintillating radiation flux, which is proportional to the squared scintillation index. It follows from the obtained data that the radial dependence of a mean scintillation index during a deep solar activity minimum of 2008–2009 occurs to be weaker than one could expect in the case of spherically symmetric geometry of the solar wind. Suppression of a radial dependence of the mean scintillation index is explained by the effect of the heliospheric current sheet, which reveals itself in a high density of solar wind’s turbulent plasma in the helioequator plane. It is shown that the level of scintillations, averaged over monthly series of observations, was changing synchronously with the solar activity level.


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    Titel :

    Interplanetary scintillations of an ensemble of radio sources during the solar activity minimum of cycles 23/24


    Beteiligte:
    Chashei, I. V. (Autor:in) / Shishov, V. I. (Autor:in) / Tyul’bashev, S. A. (Autor:in) / Glyantsev, A. V. (Autor:in) / Subaev, I. A. (Autor:in)

    Erschienen in:

    Cosmic Research ; 51 , 1 ; 23-28


    Erscheinungsdatum :

    2013




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch


    Schlagwörter :

    Klassifikation :

    BKL:    50.93 Weltraumforschung / 39.00 Astronomie: Allgemeines / 55.60 Raumfahrttechnik
    Lokalklassifikation TIB:    770/3520/8000



    Interplanetary scintillations of an ensemble of radio sources during the solar activity minimum of cycles 23/24

    Chashei, I. V. / Shishov, V. I. / Tyul’bashev, S. A. et al. | Springer Verlag | 2013


    Interplanetary scintillations of the radio source ensemble at the maximum of cycle 24 of solar activity

    Chashei, I. V. / Shishov, V. I. / Tyul’bashev, S. A. et al. | Springer Verlag | 2016


    Interplanetary scintillations of the radio source ensemble at the maximum of cycle 24 of solar activity

    Chashei, I. V. / Shishov, V. I. / Tyul’bashev, S. A. et al. | Online Contents | 2016


    Tracking Interplanetary Disturbances using Interplanetary Scintillations

    Janardhan, P. et al. | British Library Online Contents | 1997