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Title:
Z-rich solar particle event characteristics 1972-1976
Authors:
Zwickl, R. D.; Roelof, E. C.; Gold, R. E.; Krimigis, S. M.; Armstrong, T. P.
Affiliation:
AA(Johns Hopkins University, Applied Physics Laboratory, Laurel, Md.), AB(Johns Hopkins University, Applied Physics Laboratory, Laurel, Md.), AC(Johns Hopkins University, Applied Physics Laboratory, Laurel, Md.), AD(Johns Hopkins University, Applied Physics Laboratory, Laurel, Md.), AE(Kansas, University, Lawrence, Kan.)
Publication:
Astrophysical Journal, Part 1, vol. 225, Oct. 1, 1978, p. 281-303. (ApJ Homepage)
Publication Date:
10/1978
Category:
Solar Physics
Origin:
STI
NASA/STI Keywords:
Imp, Solar Activity, Solar Cosmic Rays, Solar Flares, Solar Wind, Abundance, Atmospheric Composition, Interplanetary Magnetic Fields, Solar Atmosphere, Statistical Analysis
DOI:
10.1086/156491
Bibliographic Code:
1978ApJ...225..281Z

Abstract

It is found in the reported investigation that Z-rich solar particle events usually have large and prolonged anisotropies in addition to an extremely variable charge composition that varies not only from event to event but also throughout the event. These observations suggest that one can no longer regard the event-averaged composition of solar particle events at low energies as providing an unbiased global sample of the solar atmospheric composition. The variability from event to event and among classes of events is just too great. However, the tendency for the Z-rich events to be associated with both the low-speed solar wind at or just before the onset of solar wind streams and with active regions located in the western hemisphere, indicates that charge composition studies of solar particle events can yield a better knowledge of the flare acceleration process as well as the inhomogeneous nature of magnetic field structure and particle composition in the solar atmosphere.

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Database: Astronomy
Physics
arXiv e-prints