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Published by: \apj Published on: 12/2019
YEAR: 2019   DOI: 10.3847/1538-4357/ab517b
Context. The Parker Solar Probe and the incoming Solar Orbiter mission will provide measurements of solar energetic particle (SEP) events at close heliocentric distances from the Sun. Up to present, the largest data set of SEP events in the inner heliosphere are the observations by the two Helios spacecraft.
Aims. We re-visit a sample of 15 solar relativistic electron events measured by the Helios mission with the goal of better characterising the injection histories of solar energetic particles a ...
Published by: Astronomy \& Astrophysics Published on: 01/2019
YEAR: 2019   DOI: 10.1051/0004-6361/201834520
We have constructed a semi-analytical model of the energetic-ion foreshock of a CME-driven coronal/interplanetary shock wave responsible for the acceleration of large solar energetic particle (SEP) events. The model is based on the analytical model of diffusive shock acceleration of Bell (1978), appended with a temporal dependence of the cut-off momentum of the energetic particles accelerated at the shock, derived from the theory. Parameters of the model are re-calibrated using a fully time-dependent self-consistent simul ...
Published by: Journal of Space Weather and Space Climate Published on: 02/2014
YEAR: 2014   DOI: 10.1051/swsc/2014005