Figure 11

Figure 11: This figure shows the irreducible masses (√area-∕(16π)) of individual and common apparent horizons in a binary black hole collision, as calculated by two different apparent horizon finders in the External LinkCactus toolkit, AHFinder and AHFinderDirect. (AHFinderDirect was also run in simulations at several different resolutions.) Notice that when both apparent horizon finders are run in the same simulation (resolution dx = 0.080), there are only small differences between their results. Figure reprinted with permission from [5]. © 2005 by the American Physical Society.