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Particle Acceleration and Sources in the November 1997 Solar Energetic Particle Events

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. http://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.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
http://adsabs.harvard.edu/abs/1999ICRC....6..115MADSArticle
ORCID:
AuthorORCID
Mason, G. M.0000-0003-2169-9618
Cohen, C. M. S.0000-0002-0978-8127
Additional Information:© University of Utah. Provided by the NASA Astrophysics Data System.
Group:Space Radiation Laboratory
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Space Radiation Laboratory1999-12
Record Number:CaltechAUTHORS:20150211-103123111
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20150211-103123111
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:54714
Collection:CaltechAUTHORS
Deposited By: Deborah Miles
Deposited On:13 Feb 2015 15:07
Last Modified:13 Sep 2017 16:04

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