Multi-spacecraft Observations of 3He-rich Solar Energetic Particle Events

Details Multi-spacecraft Observations of 3He-rich Solar Energetic Particle Events Multi-spacecraft Observations of 3He-rich Solar Energetic Particle Events

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsh32a0769w&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #SH32A-0769

Physics

2114 Energetic Particles (7514), 7514 Energetic Particles (2114), 7845 Particle Acceleration

Scientific paper

Solar energetic particle events with large abundance enhancements of 3He relative to 4He have been extensively studied since the 1970s using in situ observations from near-Earth spacecraft. These events, in which the compositional fractionation is believed to be the result of resonant wave-particle interactions, are thought to occur at the site of a solar flare when magnetic reconnection leads to the dissipation of a large amount of energy in plasma waves and the release of some previously-trapped particles onto open field lines. The very localized acceleration implied in such a model should result in energetic particle events that extend over relatively narrow range of heliolongitudes when observed near 1 AU. Several studies supporting this view have reported longitude distributions covering several tens of degrees for solar flares associated with 3He-rich events observed with a single, near-Earth spacecraft. The twin STEREO spacecraft, launched in October 2006 and moving away from Earth at 22.5 degrees per year, allow observations of individual 3He-rich events from two separated vantage points. We report observations of He isotopes in the MeV energy range from the first year of operation of the Low Energy Telescope (LET) instruments on STEREO-A and -B and compare with data from the ACE/SIS instrument, situated midway between the two STEREO spacecraft. This work was supported by NASA under grants NAS5-12929 and NAS5-03131.

Affiliated with

Also associated with

No associations

Rating

Multi-spacecraft Observations of 3He-rich Solar Energetic Particle Events 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 Multi-spacecraft Observations of 3He-rich Solar Energetic Particle Events, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-spacecraft Observations of 3He-rich Solar Energetic Particle Events will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1416940