Precessional instability in binary black holes with aligned spins

30 Jun 2015Davide GerosaMichael KesdenRichard O'ShaughnessyAntoine KleinEmanuele BertiUlrich SperhakeDaniele Trifirò

Binary black holes on quasicircular orbits with spins aligned with their orbital angular momentum have been testbeds for analytic and numerical relativity for decades, not least because symmetry ensures that such configurations are equilibrium solutions to the spin-precession equations. In this work, we show that these solutions can be unstable when the spin of the higher-mass black hole is aligned with the orbital angular momentum and the spin of the lower-mass black hole is anti-aligned... (read more)

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