Formation, Evolution, and the Structure of Fronts Produced By Unsteady Injection of Highly Magnetized, Relativistic Flows

Astronomy and Astrophysics – Astrophysics

Scientific paper

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10 pages, LaTex, one figure (ps), to appear in ApJ

Scientific paper

10.1086/304709

We study the formation, evolution and structure of dissipative fronts produced by overtaking collisions of relativistic streams, with emphasis on strongly magnetized flows. The evolution of the system is followed using analytical approach in the simple wave regime and numerical simulations in the non-simple wave regime, until a steady-state is reached. The steady-state structure of the front is then examined by solving the appropriate jump conditions. The conversion of magnetic energy into kinetic energy is parametrized in terms of the Alfv\'en 4-velocity inside the front. The implications for gamma-ray jets are briefly discussed.

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