Type III Radio Emission

  • type III burst, rapidly drifting, often with fundamental/2nd harmonic structure, due to plasma emission. The fundamental is highly o-mode polarized, and the 2nd harmonic is weakly (15%) x-mode polarized.
    • cause is a stream, or beam, of electrons moving at speed ~ c/3, propagating from low corona into interplanetary space (also seen down to kilometric wavelengths).
  • type III storm – a long lasting (up to a day or more) series of type III bursts, RS (reverse slope) bursts, reverse-drift pairs, and continuum.