# Density and Magnetic Field Evolution

Here we look at the time evolution of the rest-mass density and magnetic fields. The rest-mass density is normalized to the maximum density at $t/M = 206$. Time is measured in $M = 1.1 \times 10^{-2} (M_{NS} /1.8M_{\odot} ) \ ms$ . The neutron stars spiral inwards until they merge and undergo a prompt collapse to form a black hole. After formation of the black hole, the magnetic field lines point radially away from the black hole, and no collimated jet is launched from the poles. The resulting disk is smaller than the unequal mass case, but larger than the heavier mass case.

 Fig. 1-1: Density and magnetic fields Fig. 1-2: Density and magnetic fields, from above Fig. 1-3: Density and magnetic fields
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