Formation of power-law electron spectra in collapsing magnetic traps

Details Formation of power-law electron spectra in collapsing magnetic traps Formation of power-law electron spectra in collapsing magnetic traps

Jan 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007astl...33...54b&link_type=abstract

Astronomy Letters, Volume 33, Issue 1, pp.54-62

Astronomy and Astrophysics

Astronomy

8

Scientific paper

The energy distribution of the fast electrons captured into a collapsing magnetic trap in the solar corona is calculated as a function of the trap length and diameter. It is shown that if the electrons injected into the trap have a power-law spectrum, then their spectrum remains a power-law one with the same slope throughout the acceleration process for both the Fermi and betatron acceleration mechanisms. For electrons with a thermal injection spectrum, the model predicts two types of hard X-ray sources, thermal and nonthermal. Thermal sources are formed in traps dominated by the betatron mechanism. Nonthermal sources with a power-law spectrum are formed when electrons are accelerated by the Fermi mechanism.

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