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Grazing Collisions of Black Holes via the Excision of Singularities
We present the first simulations of non-head-on (grazing) collisions of binary black holes in which the singularities are excised from the simulation. Initially equal mass $m$ black holes (spinning or not) are separated by $\ensuremath{\approx}10m$ and with impact parameter $\ensuremath{\approx}2m$. Evolutions to $t\ensuremath{\approx}35m$ are obtained where two separate horizons are …