3D Relativistic MHD Simulations of Magnetized Spine-Sheath Relativistic Jets

Details 3D Relativistic MHD Simulations of Magnetized Spine-Sheath Relativistic Jets 3D Relativistic MHD Simulations of Magnetized Spine-Sheath Relativistic Jets

2006-11-06

arxiv.org/abs/astro-ph/0611190v1

PoSMQW6:086,2006

Astronomy and Astrophysics

Astrophysics

5 pages, 2 figures, to appear in the Proceedings of the VI Microquasar Workshop: "Microquasars and Beyond", Como, Italy, Septe

Scientific paper

We have performed numerical simulations of weakly and strongly magnetized relativistic jets embedded in a weakly and strongly magnetized stationary or mildly relativistic (0.5c) sheath using the RAISHIN code. In the numerical simulations a jet with Lorentz factor \gamma=2.5 is precessed to break the initial equilibrium configuration. Results of the numerical simulations are compared to theoretical predictions from a normal mode analysis of the linearized RMHD equations describing a uniform axially magnetized cylindrical relativistic jet embedded in a uniform axially magnetized moving sheath. The prediction of increased stability of a weakly-magnetized system with mildly relativistic sheath flow to Kelvin-Helmholtz instabilities and the stabilization of a strongly-magnetized system with mildly relativistic sheath flow is confirmed by the numerical simulations.

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