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Radio Detection of a Rapid Disturbance Launched by a Solar Flare

Janardhan Padmanabhan


We report the direct observation of very rapid motion associated with a solar flare.  The motion is seen from a radio source at 0.33 GHz, which suddenly starts moving during the rise phase of the second peak in a double--peaked event. The inferred velocity is larger than any previously inferred velocity of a disturbance in the solar atmosphere apart from freely--streaming beams of accelerated electrons. The radio emission is moderately circularly polarized and has an instantaneous bandwidth of at least 100 MHz. Its properties are not consistent with those of Type II solar radio bursts, but may be consistent with those of moving Type IV radio bursts.

  Authors: P.Janardhan, S.M. White, M.R.Kundu

  Organization: University of Maryland
     Telephone: 301-405-4967
           Fax: 301-314-9067
        e-mail: jerry@astro.umd.edu
       Address: Department of Astronomy,
   University of Maryland,
   College Park
   MD -20742

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