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Interplanetary Scintillation Observations of Coronal Mass Ejections

P.K. Manoharan


The interplanetary scintillation technique exploits scattering of radiation from compact radio sources by small-scale density turbulence in the solar wind plasma. The principal purpose of this talk is to review recent progress in the study of radial evolution of propagating coronal mass ejections (CMEs) in the inner heliosphere. A systematic monitoring of scintillation over a distance range of 0.2 - 1 AU, using about 200 to 300 sources per day, has detected interesting CMEs with good spatial resolution at different distances from the sun. These measurements have been used to investigate the evolution of size and deceleration of speed of moving CMEs. The results are compared with the near-sun manifestations and observations taken close to the earth.

  Organization: Radio Astronomy Centre (TIFR)
     Telephone: 91-423-42032
           Fax: 91-423-42588
        e-mail: mano@racooty.ernet.in
       Address: P.O. Box 8
   Ooty 643 001

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