Davide Gerosa

Caltech


High-accuracy mass, spin, and recoil predictions of generic black-hole merger remnants

Vijay Varma, Davide Gerosa, François Hébert, Leo C. Stein, Hao Zhang.
arXiv:1809.09125 [gr-qc].
Physical Review Letters, in press.

Black hole mergers are like a scattering problem. Two black holes come in, and one black hole comes out. The difference is a bunch of gravitational waves. Those are nice, of course, but the remnant black hole is important too! Here we provide accurate predictions of the mass, spin and kick of this remnant given the properties of the two merging black holes. If you need those numbers (want to build a waveform family? or test GR perhaps?) just use our python module surfinBH!

Bonus note. What if you collide ducks instead of black holes? ducks


Frequency-domain waveform approximants capturing Doppler shifts

Katie Chamberlain, Christopher J. Moore, Davide Gerosa, Nicolas Yunes.
arXiv:1809.04799 [gr-qc].

We all know Doppler shifts, right? That’s like the biibouuubiiiiboouuuuuu of an ambulance. That happens to gravitational waves as well. Suppose you have a merging binary which is emitting gravitational waves (bibooou). If that binary is going somewhere (say it’s falling into the gravitational potential of a third body), much like the ambulance, the emitted signal will be Doppler shifted. This paper shows a very nice calculation to incorporate Doppler shifts into gravitational waves.

ps. This started out as Katie’s undergraduate summer project at Caltech. Congrats Katie!


Giulio Rampa thesis prize

I was recently awarded the 2018 Giulio Rampa Thesis Prize for Outstanding Research in General Relativity. The prize is sponsored by the University of Pavia (Italy) and the Italian Society for Relativity and Gravitational Physics (SIGRAV), and was officially awarded at the 23rd SIGRAV Conference. The prize announcement reads:

Dr. Gerosa’s Ph.D. Thesis on “Source modelling at the dawn of gravitational-wave astronomy” shows an impressive ability to master a rather broad range of topics in relativistic astrophysics and gravitational wave physics. The research initiated by Dr. Gerosa in these areas has triggered follow-up work, providing new important insights and new physical scenarios. The large impact that the work of Dr. Gerosa has already had can only continue to grow.