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Figure 8: This figure shows the polar and equatorial radii of the event horizon (solid lines) and apparent horizon (dashed lines) in a numerical simulation of the collapse of a rapidly rotating neutron star to form a Kerr black hole. The dotted line shows the equatorial radius of the stellar surface. These results are from the D4 simulation of Baiotti et al. [21]. Notice how the event horizon grows from zero size while the apparent horizon first appears at a finite size and grows in a spacelike manner. Notice also that both surfaces are flattened due to the rotation. Figure reprinted with permission from [21]. © 2005 by the American Physical Society. |