Moderadores
Gravitational Waves
- Mauro Pieroni ()
We analyze data from 142 gravitational wave (GW) sources in the fourth LVK Gravitational-Wave Transient Catalog (GWTC-4.0) to estimate the Hubble constant $H_0$ jointly with the population properties of merging compact binaries. We measure the luminosity distance and redshifted masses of GW sources, and combine this with redshift information obtained by leveraging features in the binary mass...
In 10 years since the first direct observation of a gravitational wave (GW), GW astronomy has made giant leaps, going from detecting loud binary black hole (BBH) coalescences, to binary neutron star (BNS) and black hole -- neutron star (BHNS) binary events, all the way to large-volume population analyses. Yet the vast majority of events are too faint to be directly detected with coherent...
The nature and formation mechanisms of subsolar-mass (SSM) black hole binaries remain an open question in astrophysics, as such objects fall outside the predictions of standard stellar evolution. The LIGO-Virgo-KAGRA (LVK) collaboration has conducted searches for compact binary mergers involving at least one subsolar-mass component, using data from recent observing runs. This search targets...
Highly dense and isospin asymmetric matter is partly out of the reach of nuclear laboratories on Earth. Our theoretical understanding of strong and nuclear forces at high density and relatively low temperatures is also limited such that the equation of state and properties of dense matter remain a mystery. However, this particular type of matter comprises the deepest shells of the highly...
Inspiralling supermassive black hole (SMBH) binaries provide a natural explanation for the gravitational wave (GW) background observed in pulsar timing array (PTA) data. In this talk, I present a semi-analytical estimate of the GW background from SMBH binaries and discuss how the SMBH-based fit to the PTA data reveals evidence of environmental effects or binary eccentricities. I also explore...
Extreme mass ratio inspirals are a key target for next generation space-based gravitational wave detectors because they have a rich phenomenology that could offer new astrophysics and fundamental physics insights. However, their dynamics are complicated to model, and they will be buried amongst a large population of other sources in the milliHertz frequency band. Searching for these systems...
The solar plasma is a natural source of gravitational waves at high frequencies, a spectral range that is attracting increasing interest due to its potential to reveal new physical phenomena. Motivated by this, in this talk, I will present the first comprenhensive calculation of the gravitational-wave power spectrum emitted by the Sun. This includes both microscopic processes—such as...
