Gyrosynchrotron emission from anisotropic electron distributions

Gregory Fleishman, V. F. Melnikov

Research output: Contribution to journalReview articlepeer-review

94 Scopus citations


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 Isotropie 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.

Original languageEnglish (US)
Pages (from-to)823-835
Number of pages13
JournalAstrophysical Journal
Issue number2 I
StatePublished - Apr 20 2003

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


  • Acceleration of particles
  • Radiation mechanisms: nonthermal
  • Sun: flares


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