Davide Gerosa

Caltech

Wide precession: binary black-hole spins repeatedly oscillating from full alignment to full anti-alignment

Davide Gerosa, Alicia Lima, Emanuele Berti, Ulrich Sperhake, Michael Kesden, Richard O’Shaughnessy.
arXiv:1811.05979 [gr-qc].

Latest in the series of our spin-precession papers, here we found a thing that was worthy of a new name: wide precession. Another name could have been maximal nutations or something like that. These are black-hole binary configurations where the angle between any of the two spins and the orbital angular momentum changes a lot. Can’t change more actually: spins goes from full alignment to full anti-alignment. And they do it many times.

Supporting material available here.

ps. We found this wide precession during Alicia’s SURF undergraduate summer project at Caltech. Jackpot!

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