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N. Gopalswamy (NASA Goddard Space Flight Center)
Radio bursts in the interplanetary (IP) medium are indicative of solar eruptions that expel shock-driving coronal material or energetic electron beams. Type II radio bursts originate from fast-mode MHD shocks driven by coronal mass ejections (CMEs). Type III bursts are produced by energetic electrons escaping along open magnetic field lines. Occasionally, type IV bursts are also observed in the near-Sun IP medium. Radio and Plasma Waves (WAVES) experiment on board the Wind spacecraft routinely observes these radio bursts at frequencies below 14 MHz since 1994. This new radio window in the 1-14 MHz band has helped us confirm several of the well known solar-terrestrial processes and discover new processes such as the nonthermal radio emission due to colliding CMEs. The IP type II bursts are indicative of faster and wider CMEs, which are important from a space weather point of view. There is also a high degree of association between solar energetic particles and type II radio bursts implying that the same shocks accelerate protons and electrons. I provide a summary of the recent results obtained using radio and white light data.
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The author(s) of this abstract have provided an email address for comments about the abstract: gopals@fugee.gsfc.nasa.gov
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Bulletin of the American Astronomical Society, 34
© 2002. The American Astronomical Soceity.