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IPM
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“School of Astronomy”

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Paper   IPM / Astronomy / 13920
School of Astronomy
  Title:   Formation and Collimation of Relativistic MHD Jets -Simulations and Radio Maps
  Author(s): 
1.  C. Fendt
2.  O. Porth
3.  S. Sheikhnezami
  Status:   Published
  Journal: Int. Journal of Modern Physics C
  Vol.:  28
  Year:  2014
  Pages:   7
  Supported by:  IPM
  Abstract:
We present results of magnetohydrodynamic (MHD) simulations of jet formation and propagation, discussing a variety of astrophysical setups. In the first approach we consider simulations of relativistic MHD jet formation, considering jets launched from the surface of a Keplerian disk, demonstrating numerically �?? for the first time �?? the self-collimating ability of relativistic MHD jets. We obtain Lorentz factors up to �?? 10 while acquiring a high degree of collimation of about 1 degree. We then present synchrotron maps calculated from the intrinsic jet structure derived from the MHD jet formation simulation. We finally present (non-relativistic) MHD simulations of jet lauching, treating the transition between accretion and ejection. These setups include a physical magnetic diffusivity which is essential for loading the accretion material onto the outflow. We find relatively high mass fluxes in the outflow, of the order of 20-40

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