Mason, G. M. and Cohen, C. M. S. and Cummings, A. C. and Dwyer, J. R. and Gold, R. E. and Krimigis, S. M. and Leske, R. A. and Mazur, J. E. and Mewaldt, R. A. and Möbius, E. and Popecki, M. and Stone, E. C. and von Rosenvinge, T. T. and Wiedenbeck, M. E. (1999) Particle Acceleration and Sources in the November 1997 Solar Energetic Particle Events. In: Proceedings of the 26th International Cosmic Ray Conference. Vol.6. International Union of Pure and Applied Physics , pp. 115-122. https://resolver.caltech.edu/CaltechAUTHORS:20150211-103123111
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Abstract
We repon studies of two large solar energetic panicle (SEP) events on Nov. 4 and 6. 1997 that were observed using advanced energetic panicle detectori; on the ACE and the Wind spacecraft. Both events showed enriched Fe/O, and had a ~1MeV/n ^3He/^4He ratio = 2.1x 10^(-3) , 4 times the coronal value. The Nov. 6 event had exceptionally hard spectra. with much higher intensities of high energy (10s of MeV) particles than the Nov. 4 event, yet below 1MeV per nucleon the intensities in the Nov. 6 event were lower than for Nov. 4. Strong, complex temporal variations observed for ~120 keV Fe/0 contrasted with only gradual changes of this ratio at ~25 MeV/n. A spectural break was observed in the Nov. 6 event. wherein below a few MeV/n the spectra became harder. Taken together these observations point to different seed and acceleration mechanisms dominating at low and high energies in these events.
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| Additional Information: | © University of Utah. Provided by the NASA Astrophysics Data System. | ||||||||||||||||||
| Group: | Space Radiation Laboratory | ||||||||||||||||||
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| Record Number: | CaltechAUTHORS:20150211-103123111 | ||||||||||||||||||
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| ID Code: | 54714 | ||||||||||||||||||
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| Deposited By: | Deborah Miles | ||||||||||||||||||
| Deposited On: | 13 Feb 2015 15:07 | ||||||||||||||||||
| Last Modified: | 09 Mar 2020 13:19 |
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