Astronomy Reports

, Volume 61, Issue 3, pp 233–238 | Cite as

Corotating structures in the solar wind from 111-MHz observations of interplanetary scintillations at large elongations

  • A. V. Glyantsev
  • S. A. Tyul’bashev
  • I. V. Chashei
  • V. I. Shishov
  • L. B. Potapova
Article
  • 21 Downloads

Abstract

Results of continuous 111 MHz observations of interplanetary scintillations of the strong radio source 3C 48 at elongations larger than 80◦ out on the Large Phased Array (LPA) of the Lebedev Physical Institute are reported. The data were taken during a four-year interval, from 2012 to 2015, near the maximum of the 24th solar-activity cycle. The averaged elongation dependence of the scintillation index and similar dependences for individual years during the approach and recession phases suggest the presence of a periodic modulation with a 26-day period, which is masked by day-to-day variations. This periodic modulation can be explained by the existence of a long-lived region of enhanced plasma density adjacent to the solar equator during the solar-activity maximum. It is shown that the scintillation timescale increases in the transition to elongations exceeding 90◦.

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Copyright information

© Pleiades Publishing, Ltd. 2017

Authors and Affiliations

  • A. V. Glyantsev
    • 1
  • S. A. Tyul’bashev
    • 1
  • I. V. Chashei
    • 1
  • V. I. Shishov
    • 1
  • L. B. Potapova
    • 1
  1. 1.Pushchino Radio Astronomy Observatory, Astro Space Center, Lebedev Physical InstituteRussian Academy of SciencesPushchino, Moscow oblastRussia

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