Fast Gyrosynchrotron Codes

Details Fast Gyrosynchrotron Codes Fast Gyrosynchrotron Codes

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010apj...721.1127f&link_type=abstract

The Astrophysical Journal, Volume 721, Issue 2, article id. 1127-1141 (2010).

Astronomy and Astrophysics

Astronomy

8

Methods: Numerical, Radiation Mechanisms: Non-Thermal, Radio Continuum: Planetary Systems, Stars: Flare, Sun: Flares, Sun: Radio Radiation

Scientific paper

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.

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