Gyrosynchrotron Emission from Anisotropic Electron Distributions

Details Gyrosynchrotron Emission from Anisotropic Electron Distributions Gyrosynchrotron Emission from Anisotropic Electron Distributions

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003apj...587..823f&link_type=abstract

The Astrophysical Journal, Volume 587, Issue 2, pp. 823-835.

Astronomy and Astrophysics

Astronomy

39

Acceleration Of Particles, Radiation Mechanisms: Nonthermal, Sun: Flares

Scientific paper

We present numerical calculations of the intensity, degree of polarization, and spectral index of gyrosynchrotron emission produced by fast electrons with anisotropic pitch-angle distributions. The anisotropy is found to affect the emission substantially. The emission intensity can change up to a few orders of magnitude at the optically thin region compared with the isotropic case. The local value of spectral index changes considerably with the anisotropy. X-mode polarization increases for loss cone distributions and decreases for beamlike distributions. Moreover, the sense of polarization can correspond to the ordinary wave mode at the optically thin region for a certain range of view angles for beamlike distributions. We discuss possible applications and observability of the effects obtained.

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