HR: 10:45h
AN: SP42A-02    [Abstracts]
TI: Accelerated and Ambient Abundances in RHESSI Gamma-Ray Flares
AU: * Smith, D M
EM: dsmith@scipp.ucsc.edu
AF: Physics Department and Santa Cruz Institute for Particle Physics, University of California, Santa Cruz, 1156 High St, Santa Cruz, CA 95064 United States
AU: Shih, A Y
EM: ayshih@ssl.berkeley.edu
AF: Physics Department and Space Sciences Laboratory, University of California, Berkeley, 7 Gauss Wy, Berkeley, CA 94720 United States
AU: Lin, R P
EM: rlin@ssl.berkeley.edu
AF: Physics Department and Space Sciences Laboratory, University of California, Berkeley, 7 Gauss Wy, Berkeley, CA 94720 United States
AU: Share, G H
EM: share@ssd5.nrl.navy.mil
AF: E. O. Hulburt Center for Space Research, Naval Research Laboratory, Naval Research Laboratory, Washington, DC 20375 United States
AU: Murphy, R J
EM: ronald.murphy@nrl.navy.mil
AF: E. O. Hulburt Center for Space Research, Naval Research Laboratory, Naval Research Laboratory, Washington, DC 20375 United States
AU: Schwartz, R A
EM: richard.schwartz@gsfc.nasa.gov
AF: SSAI & NASA Goddard Space Flight Center, NASA Goddard Space Flight Center, Greenbelt, MD 20771 United States
AU: Tolbert, A K
EM: kim.tolbert@gsfc.nasa.gov
AF: SSAI & NASA Goddard Space Flight Center, NASA Goddard Space Flight Center, Greenbelt, MD 20771 United States
AB: 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.
DE: 7514 Energetic particles (2114)
DE: 7519 Flares
DE: 7554 X rays, gamma rays, and neutrinos
SC: Solar Physics Division - AAS [SP]
MN: 2005 Joint Assembly