Accelerated and Ambient Abundances in RHESSI Gamma-Ray Flares

Details Accelerated and Ambient Abundances in RHESSI Gamma-Ray Flares Accelerated and Ambient Abundances in RHESSI Gamma-Ray Flares

May 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agusmsp42a..02s&link_type=abstract

American Geophysical Union, Spring Meeting 2005, abstract #SP42A-02

Physics

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

Scientific paper

The Reuven Ramaty High-Energy Solar Spectroscopic Imager (RHESSI) has detected nuclear gamma-ray line emission from at least eleven solar flares over the past three years. These gamma-ray lines are produced when flare-accelerated ions collide with the ambient solar medium. In this paper, we use gamma-ray line ratios and Doppler profiles to constrain the relative fluxes of accelerated protons, alphas, and heavier nuclei in the brighter RHESSI gamma-ray flares. We also study the relative fluxes of narrow lines to compare our conclusions about ambient solar abundances in the interaction region to earlier work from the Solar Maximum Mission Gamma-Ray Spectrometer. The work at the University of California was supported by NASA contract NAS 5-98033.

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