Davide Gerosa

Caltech


The binary black hole explorer: on-the-fly visualizations of precessing binary black holes

Vijay Varma, Leo C. Stein, Davide Gerosa.
arXiv:1811.06552 [astro-ph.HE].

As you can imagine, I’m kind of obsessed with black hole binaries. So easy (let’s face it, a black hole it’s easy! Just mass and spin), but at the same time so terribly complicated… Happy to present our attempt to see the binary dynamics in real time. Technical blah blah: we attach a visualization tool to a numerical relativity surrogate model. Are you ready to be a binary black hole explorer?

Supporting material available here.

precessing.gif

ps. Kids can have fun with black holes too! From mikesmathpage.


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!