Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006chjaa...6..751l&link_type=abstract
Chinese Journal of Astronomy & Astrophysics, Vol. 6, p. 751-758
Astronomy and Astrophysics
Astrophysics
2
Sun: Flare, Sun: Particle Acceleration, Shock Acceleration, Interplanetary Propagation
Scientific paper
Based on cosmic ray data obtained by neutron monitors at the Earth's surface, and data on near-relativistic electrons measured by the WIND satellite, as well as on solar X-ray and radio burst data, the solar energetic particle (SEP) event of 2005 January 20 is studied. The results show that this event is a mixed event where the flare is dominant in the acceleration of the SEPs, the interplanetary shock accelerates mainly solar protons with energies below 130~MeV, while the relativistic protons are only accelerated by the solar flare. The interplanetary shock had an obvious acceleration effect on relativistic electrons with energies greater than 2~MeV. It was found that the solar release time for the relativistic protons was about 06:41~UT, while that for the near-relativistic electrons was about 06:39~UT. The latter turned out to be about 2 min later than the onset time of the interplanetary type III burst.
Han Yan-Ben
Le Gui Ming
Tang Y.-H.
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