An Explanation for the Different Locations of Electron and Ion Acceleration in Solar Flares

Details An Explanation for the Different Locations of Electron and Ion Acceleration in Solar Flares An Explanation for the Different Locations of Electron and Ion Acceleration in Solar Flares

Feb 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004apj...602l..69e&link_type=abstract

The Astrophysical Journal, Volume 602, Issue 1, pp. L69-L72.

Astronomy and Astrophysics

Astronomy

29

Sun: Flares, Sun: X-Rays, Gamma Rays

Scientific paper

RHESSI observations of the 2002 July 23 solar flare have shown that hard X-rays and gamma rays are produced in different locations within the flare volume. The gamma-ray emission, which is a diagnostic of ion acceleration, appears to originate in the vicinity of large loops, while the hard X-ray emission, a diagnostic of electron acceleration, originates near shorter loops. The tendency for a stochastic acceleration model based on cascading MHD turbulence to favor ion acceleration in larger acceleration regions has been previously noted. Here we evaluate this effect quantitatively and show that such a model is consistent with the RHESSI observations.

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