The detection of gravitational waves (GWs) has opened a new window in our understanding of the Universe. Contrary to what was expected before the first detection, the vast majority of the GW detections by the Advanced LIGO-Virgo interferometers are binary black holes (BBHs) with stellar masses (less than 100 Msun). The origin of these BBHs is not known: they may have a cosmological origin and be part of the dark matter in the Universe, so called primordial black holes (PBHs). Alternatively, they have an astrophysical origin and formed from binary and/or triple massive stars, or they formed in dynamical interactions in dense stellar systems such as star clusters and nuclear clusters.
Neutron star binaries have also been detected in gravitational waves, and these observations have provided key constraints on the mass and radii of compact objects and on key nucleosynthesis processes in the universe. [+]
The ICCUB is a full member of the Virgo collaboration, and therefore works at the forefront of GW research. Staff members are making model prediction for primordial BBHs and dynamically formed BBH in star clusters with the aim to constrain their contribution to BBH mergers in the Universe.
Using expertise on nuclear and hadronic physics, our staff provide predictions for the neutron star equation of state and the tidal polarizability that affects the gravitational waveform of neutron-star binaries.