Modeling Poynting flux vs. kinetic-energy dominated jets

Details Modeling Poynting flux vs. kinetic-energy dominated jets Modeling Poynting flux vs. kinetic-energy dominated jets

2011-11-03

arxiv.org/abs/1111.0975v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

2 pages, 1 figure to appear in the proceedings of the "Magnetic Fields in the Universe III" meeting, Zakopane, PL

Scientific paper

We present 3D-MHD AMR simulations of Poynting flux dominated (PFD) jets formed by injection of magnetic energy. We compare their evolution with a hydrodynamic jet which is formed by injecting kinetic energy with the same energy flux than the PFD jets. We predict characteristic emission distributions for each of these jets. Current-driven perturbations in PFD jets are amplified by both cooling and rotation for the regimes studied: Shocks and thermal pressure support are weakened by cooling, making the jets more susceptible to kinking. Rotation amplifies the toroidal magnetic field which also exacerbates the kink instability.

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