Fast gyrosynchrotron codes

Gregory Fleishman, Alexey A. Kuznetsov

Research output: Contribution to journalArticlepeer-review

74 Scopus citations

Abstract

Radiation produced by charged particles gyrating in a magnetic field is highly significant in the astrophysics context. Persistently increasing resolution of astrophysical observations calls for corresponding three-dimensional modeling of the radiation. However, available exact equations are prohibitively slow in computing a comprehensive table of high-resolution models required for many practical applications. To remedy this situation, we develop approximate gyrosynchrotron (GS) codes capable of quickly calculating the GS emission (in non-quantum regime) from both isotropic and anisotropic electron distributions in non-relativistic, mildly relativistic, and ultrarelativistic energy domains applicable throughout a broad range of source parameters including dense or tenuous plasmas and weak or strong magnetic fields. The computation time is reduced by several orders of magnitude compared with the exact GS algorithm. The new algorithm performance can gradually be adjusted to the user's needs depending on whether precision or computation speed is to be optimized for a given model. The codes are made available for users as a supplement to this paper.

Original languageEnglish (US)
Pages (from-to)1127-1141
Number of pages15
JournalAstrophysical Journal
Volume721
Issue number2
DOIs
StatePublished - Oct 1 2010

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • Methods: numerical
  • Radiation mechanisms: non-thermal
  • Radio continuum: planetary systems
  • Stars: flare
  • Sun: flares
  • Sun: radio radiation

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