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    • Time structure of solar decametre type III radio bursts

      G. Thejappa Ch. V. Sastry

      Volume 3 Issue 2 June 1982 pp 151-159

    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/joaa/003/02/0151-0159

    • Keywords

       

      Sun-Type III bursts; time profiles

    • Abstract

       

      The time structure of solar radio decametre Type III bursts occurring during the periods of enhanced emission is investigated. It is found that the time profiles can take a variety of forms of which three distinct types are the following: (1) profiles where the intensity rises to a small but steady value before the onset of the main burst, (2) the intensity of the main burst reduces to a finite level and remains steady before it decays to the base level, (3) the steady state is present during the rise as well as the decay phase of the main burst.

      It is shown that these profiles are not due to random superposition of bursts with varying amplitudes. They are also probably not manifestations of fundamental-harmonic pairs. Some of the observed time profiles can be due to superposition ot bursts caused by ordered electron beams ejected with a constant time delay at the base of the corona.

    • Author Affiliations

       

      G. Thejappa1 2 Ch. V. Sastry1 2

      1. Indian Institute of Astrophysics, Bangalore - 560034
      2. Raman Research Institute, Bangalore - 560080

    • Dates

       
      Published
      June 1982
      Manuscript received
      30 December 1981
      Accepted
      26 March 1982

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