Understanding large SEP events with the PATH code: Modeling of the 13 December 2006 SEP event

Details Understanding large SEP events with the PATH code: Modeling of the 13 December 2006 SEP event Understanding large SEP events with the PATH code: Modeling of the 13 December 2006 SEP event

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010jgra..11512103v&link_type=abstract

Journal of Geophysical Research, Volume 115, Issue A12, CiteID A12103

Physics

Plasma Physics

4

Space Plasma Physics: Particle Acceleration, Solar Physics, Astrophysics, And Astronomy: Energetic Particles (2114), Interplanetary Physics: Interplanetary Shocks, Space Plasma Physics: Mathematical And Numerical Techniques (0500, 3200)

Scientific paper

The Particle Acceleration and Transport in the Heliosphere (PATH) numerical code was developed to understand solar energetic particle (SEP) events in the near-Earth environment. We discuss simulation results for the 13 December 2006 SEP event. The PATH code includes modeling a background solar wind through which a CME-driven oblique shock propagates. The code incorporates a mixed population of both flare and shock-accelerated solar wind suprathermal particles. The shock parameters derived from ACE measurements at 1 AU and observational flare characteristics are used as input into the numerical model. We assume that the diffusive shock acceleration mechanism is responsible for particle energization. We model the subsequent transport of particles originated at the flare site and particles escaping from the shock and propagating in the equatorial plane through the interplanetary medium. We derive spectra for protons, oxygen, and iron ions, together with their time-intensity profiles at 1 AU. Our modeling results show reasonable agreement with in situ measurements by ACE, STEREO, GOES, and SAMPEX for this event. We numerically estimate the Fe/O abundance ratio and discuss the physics underlying a mixed SEP event. We point out that the flare population is as important as shock geometry changes during shock propagation for modeling time-intensity profiles and spectra at 1 AU. The combined effects of seed population and shock geometry will be examined in the framework of an extended PATH code in future modeling efforts.

Affiliated with

Also associated with

No associations

Rating

Understanding large SEP events with the PATH code: Modeling of the 13 December 2006 SEP event does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Understanding large SEP events with the PATH code: Modeling of the 13 December 2006 SEP event, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Understanding large SEP events with the PATH code: Modeling of the 13 December 2006 SEP event will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1295145