In this talk I will present the detection of NS-BH binary mergers with gravitational waves by the LIGO - Virgo- KAGRA collaboration. I will first present how the events GW200105 and GW200115 were detected: the first was observed by LIGO Livingston and Virgo, and the second
by all three LIGO–Virgo detectors. Then I will detail the main properties of the events and how we establish the...
The black holes detected by the LVK gravitational wave detectors have masses (typically 20-50 Msun) that are systematically heavier than those detected in X-ray binaries (5-20 Msun). This mass discrepancy suggests different progenitor stellar environments, especially metallicity, between X-ray binary and gravitational wave black holes. We have built a model Universe that represents star...
As the knowledge of the gravitational-wave (GW) sources population is improving, it is possible to compute the probability of astrophysical origin of the GW events and make a source classification.
Rapid source classification in low-latency searches provides useful information for astronomers to undertake a follow-up of the source or not.
In the offline searches, the probability of...
A binary system can be resonantly excited by a distant perturber if its precession frequency is equal to the period of the faraway object. I will show how this can dramatically increase the eccentricity of the binary, pushing it to values observables in the LISA band. This phenomenon is new and distinct from the Kozai-Lidov mechanism since it operates in a corner of the parameter space where...
All neutron star progenitors in neutron-star High-Mass X-ray Binaries (NS HMXBs) undergo a supernova event that may lead to a significant natal kick impacting the motion of the whole binary system. The space observatory Gaia performs a deep optical survey with exquisite astrometric accuracy, for both position and proper motions, that can be used to study natal kicks in NS HMXBs.
We aim to...
