Speaker
Nicolas Sanchis-Gual
Description
We have performed a systematic study of the dynamics and the emission of gravitational radiation in head-on collisions of dynamically robust spinning vector boson stars, aka Proca stars. We find that the wave-like nature of bosonic stars has large impact on the gravitational-wave emission. The energy emitted in gravitational waves critically depends on the difference between the oscillation frequencies of the primary and secondary stars Δ𝜔/𝜇=(𝜔1−𝜔2)/𝜇 in a non-monotonic way. In the unequal-mass case we observe a periodic modulation of the radiated energy as a function of 𝜔2/𝜇 of the secondary star with fixed 𝜔1/𝜇 that we relate to constructive and destructive interference due to the interaction of the Proca field with itself.
