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Energetic Particle Associations to Interplanetary Shocks During Seven Years of SOHO/ERNE

 

  • Authors: Hutunen-Heikinmaa, K et.al.
  • Publication: Proceedings of the 29th International Cosmic Ray Conference. August 3-10, 2005, Pune, India. Edited by B. Sripathi Acharya, Sunil Gupta, P. Jagadeesan, Atul Jain, S. Karthikeyan, Samuel Morris, and Suresh Tonwar. Mumbai: Tata Institute of Fundamental Research, 2005. Volume 1, p.59, 2005
  • Solar events between 1996 May 1 and 2003 April 30
  • Statistical study
  • ADS link
  • Abstract: Transient interplanetary (IP) shock passages are usually identified by abrupt changes in the plasma parameters, but sometimes they are also associated with energetic storm particles (ESPs). The maximum observed energies of the ESPs usually reach few MeVs per nucleon, and occasionally even few hundred MeVs per nucleon. We have initiated a statistical study of ESP events observed by SOHO/ERNE. In the first stage, we gathered a comprehensive database of IP shock candidates (529 entries from which 243 are reliable fast forward shocks) using several ready-made shock lists. Then we classified the possible ESP signals of the fast forward shocks, and inspected the proton spectra of selected cases. Our study period is from May 1996 to April 2003. We present the preliminary results.

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