Solar Microwave Bursts and Electron Kinetics

Details Solar Microwave Bursts and Electron Kinetics Solar Microwave Bursts and Electron Kinetics

Jun 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003jkas...36s..63l&link_type=abstract

Journal of the Korean Astronomical Society, vol. 36, S1, pp. S63-S73

Astronomy and Astrophysics

Astronomy

1

Sun: Flares, Sun: Radio Radiation, Sun: Magnetic Fields, Radiation Mechanisms: Nonthermal

Scientific paper

Solar flares present a number of radiative characteristics indicative of kinetic processes of high energy particles. Proper understanding of the kinetic processes, however, relies on how well we can separate the acceleration from transport characteristics. In this paper, we discuss microwave and hard X-ray bursts as a powerful tool in investigating the acceleration and transport of high energy electrons. After a brief review of the studies devoted to the kinetic process of solar flare particles, we cast them into a simple formulation which allows us to handle the injection, trap, and precipitation of flare electrons self-consistently. The formulation is then taken as a basis for interpreting and analyzing a set of impulsive and gradual bursts occurred on 2001 April 6 observed with the Owens Valley Solar Array, and HXT/WBS onboard Yohkoh satellite. We quantify the acceleration, trap, and precipitation processes during each burst in terms of relevant time scales, and also determine ambient density and magnetic field. Our result suggests that it should be the acceleration property, in particular, electron pitch angle distribution, rather than the trap condition, that is mainly responsible for the distinctive properties of the impulsive and gradual flares.

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