Optimized gyrosynchrotron algorithms and fast codes

Details Optimized gyrosynchrotron algorithms and fast codes Optimized gyrosynchrotron algorithms and fast codes

2010-11-13

arxiv.org/abs/1011.3156v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

Proceedings of the IAU Symposium 274 "Advances in Plasma Astrophysics"

Scientific paper

Gyrosynchrotron (GS) emission of charged particles spiraling in magnetic fields plays an exceptionally important role in astrophysics. In particular, this mechanism makes a dominant contribution to the continuum solar and stellar radio emissions. However, the available exact equations describing the emission process are extremely slow computationally, thus limiting the diagnostic capabilities of radio observations. In this work, we present approximate GS codes capable of fast calculating the emission from anisotropic electron distributions. The computation time is reduced by several orders of magnitude compared with the exact formulae, while the computation error remains within a few percent. The codes are implemented as the executable modules callable from IDL; they are made available for users via web sites.

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