Particle reacceleration and apparent radio source structure

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Galactic Structure, Magnetohydrodynamic Stability, Particle Acceleration, Plasma Turbulence, Radio Galaxies, Astronomical Models, Interstellar Magnetic Fields, Magnetohydrodynamic Waves

Scientific paper

The radio galaxy model which uses magnetohydrodynamic turbulence generated by surface instabilities to reaccelerate the radiating electrons has striking consequences for apparent source structure. Strong wave damping in the plasma results in a narrow turbulent edge. Particles accelerated in this edge must diffuse across field lines into the radio source; this predicts strong limb brightening in some cases. The structure of this edge and diffusion into the source are described. The relevance of this model to jets, radio tails, and standard double sources is discussed.

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