Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010apj...723..550r&link_type=abstract
The Astrophysical Journal, Volume 723, Issue 1, pp. 550-554 (2010).
Astronomy and Astrophysics
Astronomy
1
Acceleration Of Particles, Shock Waves, Sun: Coronal Mass Ejections: Cmes, Sun: Particle Emission, Sun: Radio Radiation
Scientific paper
We examine the onset timing of solar energetic particles in the large ground-level event (GLE) of 1977 November 22 as observed from six spacecraft at four distinct solar longitudes. In most cases, it was possible to use velocity dispersion of the energetic protons to fix the solar particle release (SPR) time and the path length traveled by the initial particle burst from each solar longitude. We find that the SPR times do depend upon solar longitude, being earliest for spacecraft that are magnetically well connected to the source region, and later for longitudes on the flanks of the outward-driven shock wave. The earliest SPR time occurs well after peak photon emission from the associated Hα flare. These observations are consistent with conclusions derived from single-longitude observations of different GLE events. They are consistent with shock acceleration over a broad spatial region with heights rising, and/or shock speeds falling, for longitudes on the flanks of the shock.
Lal Nand
Reames Donald. V.
No associations
LandOfFree
A Multi-spacecraft View of Solar-energetic-particle Onsets in the 1977 November 22 Event does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A Multi-spacecraft View of Solar-energetic-particle Onsets in the 1977 November 22 Event, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Multi-spacecraft View of Solar-energetic-particle Onsets in the 1977 November 22 Event will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1159810