Onsets and Release Times in Solar Particle Events
Abstract
The time at which solar energetic particles (SEPs) are first released into interplanetary space, and its relation to CMEs and various photon emissions, are important clues to the site and nature of the SEP acceleration mechanism [1- 5,7,8,10,11]. We examine velocity dispersion among onsets in electrons and ions from Wind, ACE, and IMPB, as well as available neutron monitors, to determine the solar release time. We present results for two large impulsive events (1 May 2000 and 14 April 2001) and three western ground level events (GLEs; 6 November 1997, 6 May 1998, and 15 April 2001). In the impulsive events, the particle release coincides with hard x-ray emission. But the large GLEs show delayed release with respect to 1-ray emission, consistent with acceleration by the CME-driven shock.
Additional Information
Copyright Universal Academy Press Inc. We thank K. Hurley, C. Lopate, R. Pyle, I. Usoskin, and E. Vashenyuk for data. AJT supported by NASA DPR S-13791G and the Office of Naval Research.Attached Files
Published - 2003-13.pdf
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Additional details
Identifiers
- Eprint ID
- 56340
- Resolver ID
- CaltechAUTHORS:20150403-100248724
Related works
- Describes
- http://adsabs.harvard.edu/full/2003ICRC....6.3305T (URL)
Funding
- NASA
- DPR S13791G
- Office of Naval Research (ONR)
Dates
- Created
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2015-04-05Created from EPrint's datestamp field
- Updated
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2019-11-22Created from EPrint's last_modified field
Caltech Custom Metadata
- Caltech groups
- Space Radiation Laboratory
- Other Numbering System Name
- Space Radiation Laboratory
- Other Numbering System Identifier
- 2003-13