Models of radio galaxies with tangled magnetic fields. I - Calculation of magnetic field transport, Stokes parameters and synchrotron losses. II - Numerical simulations and their interpretation

Details Models of radio galaxies with tangled magnetic fields. I - Calculation of magnetic field transport, Stokes parameters and synchrotron losses. II - Numerical simulations and their interpretation Models of radio galaxies with tangled magnetic fields. I - Calculation of magnetic field transport, Stokes parameters and synchrotron losses. II - Numerical simulations and their interpretation

Feb 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990mnras.242..616m&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 242, Feb. 15, 1990, p. 616-635.

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Astronomical Models, Extragalactic Radio Sources, Interstellar Magnetic Fields, Radio Galaxies, Stokes Law Of Radiation, Synchrotron Radiation, Computational Astrophysics, Probability Distribution Functions

Scientific paper

Consideration is given to numerical simulations of radio sources in which a randomly tangled magnetic field is introduced in the jet and is convected passively with the fluid flow. The intrinsic polarization distribution of the source model is determined by the distortion of the field by compression and shear in the flow. Results are presented from calculations of the distortion of a frozen-in field by the fluid flow and the synchrotron losses suffered by the relativistic electrons injected with the fluid. Also, simulations with conventional fluid dynamics are discussed, focusing on the development of the magnetic field and the impact of the magnetic field on brightness distribution and polarization of observable radio images. In these simulations a randomly tangled magnetic field and an energy spectrum of relativistic electrons are introduced with the jet. It is found that the magnetic field strength and radio emissivity vary widely through the source in ways that are not directly related to the pressure distribution.

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