Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007apj...662l.127s&link_type=abstract
The Astrophysical Journal, Volume 662, Issue 2, pp. L127-L130.
Astronomy and Astrophysics
Astronomy
11
Acceleration Of Particles, Shock Waves, Sun: Coronal Mass Ejections (Cmes), Sun: Flares, Sun: Particle Emission
Scientific paper
Large gradual solar energetic particle (SEP) events have been found to be highly variable in their heavy ion characteristics at high energies, where these events start to show signatures typically associated with impulsive events. The signatures include enhancements in heavy ion abundances, elevated charge states of Fe at high energies, and enhanced 3He/ 4He ratios. We present results from test-particle simulations, considering the behavior of Fe and O ions in a semirealistic model for the solar corona, that diffusive shock acceleration can produce most of the observed features if the seed ions consist of suprathermals from the corona and flares. We also compare our results to a recently developed SEP model of Tylka & Lee (2006) and find that the critical assumptions of the model are qualitatively correct and that, despite its simplicity, it may provide a realistic description of the compositional and spectral variability of heavy ions in SEP events.
Sandroos Arto
Vainio Rami
No associations
LandOfFree
Simulation Results for Heavy Ion Spectral Variability in Large Gradual Solar Energetic Particle Events 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 Simulation Results for Heavy Ion Spectral Variability in Large Gradual Solar Energetic Particle Events, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Simulation Results for Heavy Ion Spectral Variability in Large Gradual Solar Energetic Particle Events will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1419266