Stochastic Electron Acceleration by Cascading Fast Mode Waves in Impulsive Solar Flares

Details Stochastic Electron Acceleration by Cascading Fast Mode Waves in Impulsive Solar Flares Stochastic Electron Acceleration by Cascading Fast Mode Waves in Impulsive Solar Flares

Apr 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996apj...461..445m&link_type=abstract

Astrophysical Journal v.461, p.445

Astronomy and Astrophysics

Astronomy

125

Acceleration Of Particles, Plasmas, Sun: Corona, Sun: Flares, Sun: Particle Emission

Scientific paper

We present a model for the acceleration of electrons from thermal to ultrarelativistic energies during an energy release fragment in an impulsive solar flare. Long-wavelength low-amplitude fast mode waves are assumed to be generated during the initial flare energy release (by, for example, large-scale restructuring of the magnetic field). These waves nonlinearly cascade to higher wavenumbers and eventually reach the dissipation range, whereupon they are transit-time damped by electrons in the tail of the thermal distribution. The electrons, in turn, are energized out of the tail and into substantially higher energies. We find that for turbulence energy densities much smaller than the ambient magnetic field energy density and comparable to the thermal particle energy density, and for a wide range of initial wavelengths, a sufficient number of electrons are accelerated to hard X-ray-producing energies on observed timescales. We suggest that MHD turbulence unifies electron and proton acceleration in impulsive solar flares, since a preceding study established that a second MHD mode (the shear Alfvén wave) preferentially accelerates protons from thermal to gamma-ray line-producing energies.

Affiliated with

Also associated with

No associations

Rating

Stochastic Electron Acceleration by Cascading Fast Mode Waves in Impulsive Solar Flares does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Stochastic Electron Acceleration by Cascading Fast Mode Waves in Impulsive Solar Flares, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Stochastic Electron Acceleration by Cascading Fast Mode Waves in Impulsive Solar Flares will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1334697