Recent Results of the 2005 LWS TR&T Focus Team for Solar Energetic Particles

Details Recent Results of the 2005 LWS TR&T Focus Team for Solar Energetic Particles Recent Results of the 2005 LWS TR&T Focus Team for Solar Energetic Particles

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsh23c..03d&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #SH23C-03

Mathematics

Logic

2101 Coronal Mass Ejections (7513), 2114 Energetic Particles (7514), 2139 Interplanetary Shocks, 7513 Coronal Mass Ejections (2101)

Scientific paper

Shock waves driven by coronal mass ejections are presently believed to be responsible for producing large gradual solar energetic particle (SEP) events that can pose significant radiation hazard for humans and technological systems near Earth. However, our present ability to accurately predict various properties of SEP events (e.g., peak intensities, energy spectra, and composition) is somewhat limited. Reliable prediction of these properties depends on a multitude of observational and theoretical cross-disciplinary studies that include: (1) Understanding and modeling the initiation and propagation of fast CMEs and the evolution of shock characteristics as they travel through the corona and interplanetary medium, (2) Characterizing the ambient coronal and solar wind plasma, the solar and interplanetary magnetic field, and the suprathermal ion population through which the CMEs and their shocks propagate en route to Earth, and (3) Developing a detailed understanding of particle injection and acceleration at CME-driven shocks and their subsequent transport out to 1 AU. Such studies are being routinely conducted both, individually and collectively by members of the 2005 LWS TR&T Focus Team for SEPs. In this talk we will summarize the SEP Team's ongoing efforts, highlight the key new results, and discuss some of the main scientific challenges that we need to overcome in order to improve current understanding of the physical processes occurring in large SEP events.

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