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GRMHD Simulations of Jet Formation with a New CodeWe have developed a new three-dimensional general relativistic magnetohydrodynamic (GRMHD) code by using a conservative, high-resolution shock-capturing scheme. The numerical fluxes are calculated using the HLL approximate Riemann solver scheme. The flux-interpolated, constrained transport scheme is used to maintain a divergence-free magnetic field. Various one-dimensional test problems in both special and general relativity show significant improvements over our previous model. We have performed simulations of jet formations from a geometrically thin accretion disk near both nonrotating and rotating black holes. The new simulation results show that the jet is formed in the same manner as in previous work and propagates outward. In the rotating black hole cases, jets form much closer to the black hole's ergosphere and the magnetic field is strongly twisted due the frame-dragging effect. As the magnetic field strength becomes weaker, a larger amount of matter is launched with the jet. On the other hand, when the magnetic field strength becomes stronger, the jet has less matter and becomes poynting-flux dominated. We will also discuss how the jet properties depend on the rotation of a black hole.
Document ID
20060047865
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Mizuno, Y.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Nishikawa, K.-I.
(National Space Science and Technology Center Huntsville, AL, United States)
Koide, S.
(Kumamoto Univ. Japan)
Hardee, P.
(Alabama Univ. AL, United States)
Fishman, G. J.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
August 23, 2013
Publication Date
January 1, 2006
Subject Category
Astrophysics
Meeting Information
Meeting: Eleventh Marcel Grossman Meeting
Location: Berlin
Country: Germany
Start Date: July 23, 2006
End Date: July 29, 2006
Distribution Limits
Public
Copyright
Other

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