Solar Energetic Particles and CME-driven Shocks

Details Solar Energetic Particles and CME-driven Shocks Solar Energetic Particles and CME-driven Shocks

Aug 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006iaujd...1e..54g&link_type=abstract

Cosmic Particle Acceleration, 26th meeting of the IAU, Joint Discussion 1, 16-17 August, 2006, Prague, Czech Republic, JD01, #54

Physics

Scientific paper

Large solar energetic particle (SEP) events are associated with coronal mass ejections (CMEs) of very high speed (~1500 km/s). A mass mtion of such high speeds in the coronal and interplanetary plasma has to drive fast mode MHD shocks. Direct evidence of such shocks come from in situ observations of shock arriving at 1 AU immediately followed by the driving CMEs. The energetic storm particle (ESP) events associated with these shocks present direct evidence for shock acceleration. Shocks near the Sun have to be remote-sensed using type II bursts of type II. Type II bursts occurring over wide range of wavelengths are known to be associated with very fast and wide CMEs (Gopalswamy et al., 2005). We analyze a set of such type II bursts observed during solar cycle 23 and the associated SEP and CME events to explore the relationship bewteen CME-driven shocks and SEPs near the Sun. We also study the association of the type II burst events with the interplanetary shocks observed in situ and ESP events. The main result is that when the CME associated with the type II bursts originate on the disk center of the Sun, they result in shocks at 1 AU followed by driving CMEs. We also discuss the relationship bewteen type II bursts and ESP events. Reference: Gopalswamy, N., E. Aguilar-Rodriguez, S. Yashiro, S. Nunes, M. L. Kaiser, and R. A. Howard, Type II radio bursts and energetic solar eruptions, JGRA, 110, 12, 2005

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