Magnetic collimation of meridional-self-similar general relativistic MHD flows
arXiv:1405.7970 · doi:10.1103/PhysRevD.89.124015
Abstract
We present a model for the spine of relativistic MHD outflows in the Kerr geometry. Meridional self-similarity is invoked to derive semi-analytical solutions close to the polar axis. The study of the energy conservation along a particular field line gives a simple criterion for the collimation of jets. Such parameter have already been derived in the classical case by Sauty et al. 1999 and also extended to the Schwarzschild metric by Meliani et al. 2006. We generalize the same study to the Kerr metric. We show that the rotation of the black hole increases the magnetic self-confinement.
arXiv comment16 pages, 6 figures, accepted for publication in Physical Review D
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