Simulation of Hard X-ray Looptop Sources in Solar Flares

Details Simulation of Hard X-ray Looptop Sources in Solar Flares Simulation of Hard X-ray Looptop Sources in Solar Flares

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsh23a0332w&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #SH23A-0332

Physics

7519 Flares

Scientific paper

Many solar flares show a non-thermal X-ray emitting source at the apex of the post-flare loop. This behavior has been observed both by the Hard X-Ray telescope (HXT) on board the Japanese Yohkoh satellite and by NASA's Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI). By combining thermal plasma and non-thermal particle numerical models we are able to simulate thermal and non-thermal flare emission under a variety of increasingly realistic solar conditions. We find that looptop sources can be generated by a combination of magnetic mirroring of non-thermal particles and heated chromospheric material flowing upward from both legs of the loop. In this work we inject non-thermal, energetic particles with varying pitch angle distributions and spectral indices into plasmas contained in loops defined by an analytical magnetic field model. We monitor the evolution of these loops over time as it would be seen by HXT and RHESSI and compare the simulated emission to observations of flare loops. This work is supported by NASA grant NAG5-12820.

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