Gamma-ray Imaging of the 2005 January 20 Solar Flare

Details Gamma-ray Imaging of the 2005 January 20 Solar Flare Gamma-ray Imaging of the 2005 January 20 Solar Flare

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufmsh23a0313h&link_type=abstract

American Geophysical Union, Fall Meeting 2005, abstract #SH23A-0313

Physics

7514 Energetic Particles (2114), 7519 Flares, 7554 X-Rays, Gamma Rays, And Neutrinos

Scientific paper

Solar gamma-ray emission provides the only available observational perspective on flare-accelerated ions near the Sun. Inelastic collisions between accelerated ions and the ambient solar atmosphere produces prompt line emission, a Doppler-broadened gamma-ray continuum as well as narrow lines due to positron annihilation (511 keV) and neutron capture (2.2 MeV). In addition to this ion-related emission, there is a significant electron-bremsstrahlung contribution from electrons accelerated to energies up to 10 MeV and beyond. The 2002 January 20 event provided one of the hardest ion and electron spectra observed to date. In this paper, we report on the results of gamma-ray imaging from ~100 keV through 7 MeV, including the gamma-ray continuum and neutron-capture line. Emphasis will be on the spatial distribution of the emission as a function of energy.

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