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Solving Einstein's Equations for Binary Black Hole Spacetimes

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Post-Merger Recoils<br />

Mergers of asymmetric binaries (unequal masses and/or unequal<br />

or nonaligned spins) emit gravitational waves asymmetrically.<br />

Resulting single black hole has a “kick” velocity relative to the<br />

pre-merger center of mass.<br />

Kicks in<br />

asymmetric<br />

non-spinning<br />

binaries first<br />

studied by the<br />

Penn State and<br />

Jena groups<br />

(2006-07).<br />

Figure from<br />

González,<br />

Sperhake, and<br />

Brügmann (2009).<br />

Lee Lindblom (Caltech) <strong>Binary</strong> <strong>Black</strong> <strong>Hole</strong>s UW Milwaukee 10/14/2011 27 / 32

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