Physics
Scientific paper
Nov 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008soph..252..409s&link_type=abstract
Solar Physics, Volume 252, Issue 2, pp.409-418
Physics
2
Solar Energetic Particle, Shock, Magnetic Cloud, Particle Acceleration
Scientific paper
The behavior of solar energetic particles (SEPs) in a shock magnetic cloud interacting complex structure observed by the Advanced Composition Explorer (ACE) spacecraft on 5 November 2001 is analyzed. A strong shock causing magnetic field strength and solar wind speed increases of about 41 nT and 300 km s-1, respectively, propagated within a preceding magnetic cloud (MC). It is found that an extraordinary SEP enhancement appeared at the high-energy (≥10 MeV) proton intensities and extended over and only over the entire period of the shock MC structure passing through the spacecraft. Such SEP behavior is much different from the usual picture that the SEPs are depressed in MCs. The comparison of this event with other top SEP events of solar cycle 23 (2000 Bastille Day and 2003 Halloween events) shows that such an enhancement resulted from the effects of the shock MC complex structure leading to the highest ≥10 MeV proton intensity of solar cycle 23. Our analysis suggests that the relatively isolated magnetic field configuration of MCs combined with an embedded strong shock could significantly enhance the SEP intensity; SEPs are accelerated by the shock and confined into the MC. Further, we find that the SEP enhancement at lower energies happened not only within the shock MC structure but also after it, probably owing to the presence of a following MC-like structure. This is consistent with the picture that SEP fluxes could be enhanced in the magnetic topology between two MCs, which was proposed based on numerical simulations by Kallenrode and Cliver ( Proc. 27th ICRC 8, 3318, 2001b).
Shen Chenglong
Wang Shuang
Wang Yuming
Ye Pinzhong
No associations
LandOfFree
Enhancement of Solar Energetic Particles During a Shock Magnetic Cloud Interacting Complex Structure 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 Enhancement of Solar Energetic Particles During a Shock Magnetic Cloud Interacting Complex Structure, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Enhancement of Solar Energetic Particles During a Shock Magnetic Cloud Interacting Complex Structure will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1287948