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Particle Acceleration Associated with Interacting Coronal Mass Ejections

  • Authors: Lehtinen, N. J.; Pohjolainen, S.; Valtonen, E.; Huttunen-Heikinmaa, K.; Hillaris, A. E.
  • Publications: Proceedings of the 11th European Solar Physics Meeting "The Dynamic Sun: Challenges for Theory and Observations" (ESA SP-600). 11-16 September 2005, Leuven, Belgium. Editors: D. Danesy, S. Poedts, A. De Groof and J. Andries. Published on CDROM., p.160, 2005
  • Solar event of 2002 November 9
  • Case study
  • ADS link
  • Abstract: Two coronal mass ejections (CME1 and CME2) were observed on November 9, 2002. CME1 was estimated to start around 11 UT, directed to the Northwest with estimated average plane-of-the-sky speed of 530 km/s. CME2 was associated with a GOES M4.6 X-ray flare which started at 13:08 UT in AR0180 and was directed to the Southwest with estimated average speed of 1840 km/s. The two CMEs seem to interact around 13:50 UT and two groups of DH type III bursts are observed after it. The radio source locations observed by the Nançay Radioheliograph (NRH) at 14:05 UT at 164 MHz suggest that the radio emission might be originating from the area where the two CMEs interact over the western limb. The calculated proton onset time from the SOHO ERNE data is close to the estimated CME interaction time.

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