Density and Magnetic Field Evolution

Case B: Mass Ratio 3:1, Spin 0.5

In this case, mass ratio $q=3$ and spin $a/M=0.5$. The rest-mass density is normalized to the maximum density at $t = 0$. Time is measured from the beginning of the simulation in $M=2.5\times 10^{-2} (M_{NS}/1.4M_{\odot}) \ $ms. The neutron star spirals in towards the black hole until it is tidally disrupted, forming a disk of matter that orbits the black hole. We can see that the magnetic field lines become collimated above and below the black hole and that matter is ejected at mildly relativistic speeds. The field lines above the poles form a helical wall which drives and confines the matter in the jet. The opening angle of the jet is approximately 30 degrees.

Fig. 1-1: Initial Configuration
Fig. 1-1: Initial configuration		 Fig. 1-2: Tidal disruption of neutron star
Fig. 1-2: Tidal disruption of neutron star

Fig. 1-3: Post merger black hole and magnetic field
Fig. 1-4: Quasistationary jet outflow
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Illinois Relativity Group---University of Illinois at Urbana-Champaign

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07 Nov 2018, Kyle Nelli