Davide Gerosa

Caltech


Spin alignment and differential accretion in merging black hole binaries

Davide Gerosa, Benedetta Veronesi, Giuseppe Lodato, Giovanni Rosotti.
Monthly Notices of the Royal Astronomical Society 451 (2015) 3941-3954.
arXiv:1503.06807 [astro-ph.GA].

Supermassive black holes in binaries and their accretion discs… Spins align on some timescale, but migration also takes place. Do gas discs have enough time to align the spins? Well, the secret is the mass ratio: light secondaries might prevent primaries from aligning. A great collaboration between gravitational-wave and planet researchers!


Missing black holes in brightest cluster galaxies as evidence for the occurrence of superkicks in nature

Davide Gerosa, Alberto Sesana.
Monthly Notices of the Royal Astronomical Society 446 (2015) 38-55.
arXiv:1405.2072 [astro-ph.GA].

Black-hole kicks are powerful. I mean, really powerful. They can even eject supermassive black holes from the heavier galaxies in our Universe. And then these galaxies are left “empty”…