Conference: Meeting of the National Research Group on Gravitational Waves

Session

Contributed talks: populations of sources

1 avr. 2021, 09:00

39. Hierarchical triples can explain LIGO-Virgo mergers

Giacomo Fragione (Northwestern University)

01/04/2021 09:00

POPULATIONS DES SOURCES

The recent discovery of gravitational waves has opened new horizons. The LIGO-Virgo events have made possible to estimate rates, masses, eccentricities, and projected spins of merging black holes (BHs) for the fist time. The astrophysical origin of these mergers is among the most puzzling open questions of our time. Two primary channels have been proposed to explain the observed population of...

45. The cosmic merger rate density of compact binaries

M. Filippo Santoliquido (University of Padova)

01/04/2021 09:15

POPULATIONS DES SOURCES

With the recent publication of the second gravitational wave transient catalog by the LIGO-Virgo collaboration (LVC), the number of binary compact object mergers has risen dramatically, from a dozen to ~ 50 events. From these detections, the LVC inferred the merger rate density both in the local Universe and as a function of redshift. It is then of foremost importance to compare the merger...

46. Discriminating between different scenarios for the formation and evolution of massive black holes with LISA

Alexandre Toubiana (APC/IAP)

01/04/2021 09:30

POPULATIONS DES SOURCES

Different scenarios for the formation and evolution of massive black holes lead to different predictions for the population of massive black holes in the Universe. By reverse engineering the problem, we can use LISA observations to discriminate between different scenarios. However, the Universe is unlikely to be described by a single model. This can be accounted for by introducing mixing...

58. Searching binary black holes in Milky Way and other nearby galaxies with LISA

Rafia SARWAR (Institute of Space Technology, Islamabad, Pakistan)

01/04/2021 09:45

POPULATIONS DES SOURCES

In 2034, within the rapidly changing landscape of gravitational-wave astronomy, the Laser interferometer Space Antenna will be the first space-based detector that will observe the gravitational spectra in the millihertz frequency band. It has recently been proposed that numerous LIGO/VIRGO sources will also be detectable by LISA. LISA will be able to detect binary black holes from our Milky...

75. The massive binary black hole population across cosmic time seen under a semi-analytical perspective

David Izquierdo-Villalba (Università degli studi di Milano-Bicocca)

01/04/2021 10:00

POPULATIONS DES SOURCES

Current and future surveys are going to shed light on the formation and evolution of massive black hole binaries. While current pulsar-timing experiments will detect a gravitational wave (GW) background signal generated by the incoherent superposition of GWs from the whole population of massive binary black holes, the forthcoming LISA experiment will likely detect singular coalescences events....

73. Dynamical process impact on CBC GW background

Carole PERIGOIS (LAPP, Annecy)

01/04/2021 10:15

POPULATIONS DES SOURCES

Nowdays we are able to resolve more and more compact binary merger events as our detector sensitivities improve. However the detected sources are loud and close events, suggesting a large number of non-resolved binary mergers participating to a CBC background. I will present this background computed from a population I/II stars ehanced with a young cluster population simulated from dynamical...