Numerical and Observational Examination of the Spectral Variation of Extended Coronal Hard X-Ray Sources
Abstract
The presence of extended coronal hard X-ray sources, for example the 2005 Aug 23 flare, has opened up opportunities for probing the electrons accelerated by solar flares. The loop morphology of the source enables, through the use of RHESSI imaging spectroscopy, detailed analysis of changes in the electron flux spectrum along the spatial extent of the emission. We present a realistic one-dimensional model of the corona subject to coulomb collisions and localised stochastic acceleration akin to a looptop acceleration region. Both ballistic and diffusive transport are examined and the variation of the density weighted mean electron flux,<nVF> , along our numerical loop will be compared with RHESSI observations to determine the dominant processes in the corona. We will also comment on the validity of the leaky-box Fokker-Planck approximation.
- Publication:
-
AAS/AGU Triennial Earth-Sun Summit
- Pub Date:
- April 2015
- Bibcode:
- 2015TESS....130705S