"Multiple acceleration of protons at the sun and their scatter free propagation to the earth on 2005 January 20"
A.B. Struminsky (IKI)
Abstract:
Observations
of solar protons near the Earth and the solar flare in different
electromagnetic wave lengths on 2005 January 20 have been analyzed. Solar
protons with energies >80 MeV propagated scatter-free to the Earth
about first 30 minutes since their release into the interplanetary space,
so and the temporal and energetic characteristics of the solar injection
function determined only their intensity time profiles. The injection of
80-165 MeV protons started at 06:43 UT +/- 1min and their injection
function can be expressed as a product of the Anti Coincidence System
Spectrometer on Integral (ACS SPI) count rate (temporal dependence) and
the proton spectrum ~ Å-4.7±0.1
(energetic dependence). The
protons of higher energies were injected 4 min, but the relativistic
electrons 9 min later, than that time. A close connection between high
energetic solar electromagnetic emission and solar proton fluxes near the
Earth is a strong argument in favor of the prolonged and multiple
accelerations of protons in solar flares. Possibly, a creation of the
system of post eruption flare loops was accompanied by consequent episodes
of energy release and particle acceleration. The obtained results
contradict to the concept of solar energetic particle acceleration by the
CME.