Low-energy proton increases associated with interplanetary shock waves

Palmeira, R. A. R. ; Allum, F. R. ; Rao, U. R. (1971) Low-energy proton increases associated with interplanetary shock waves Solar Physics, 21 (1). pp. 204-224. ISSN 0038-0938

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Official URL: http://www.springerlink.com/content/nh717565840768...

Related URL: http://dx.doi.org/10.1007/BF00155791


Impulsive increases in the low energy proton flux observed by the Explorer 34 satellite, in very close time association with geomagnetic storm sudden commencements are described. It is shown that these events are of short duration (20-30 min) and occur only during the decay phase of a solar cosmic-ray flare event. The differential energy spectrum and the angular distribution of the direction of arrival of the particles are discussed. Two similar increases observed far away from the earth by the Pioneer 7 and 8 deep-space probes are also presented. These impulsive increases are compared with Energetic Storm Particle events and their similarities and differences are discussed. A model is suggested to explain these increases, based on the sweeping and trapping of low energy cosmic rays of solar origin by the advancing shock front responsible for the sudden commencement detected on the Earth.

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ID Code:42747
Deposited On:06 Jun 2011 09:29
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