Gravitation

Formation, evolution and impact of stellar binaries

Context :

Massive stars live in binaries...

Advanced Virgo+ : l’amélioration qui doit accroître la portée de Virgo d’un facteur 4 d’ici 2025.

Vue du bras nord de Virgo. @ EGO/VIRGO

Trou noir et étoile à neutrons

LIGO et Virgo font de premières observations de systèmes binaires « mixtes ».

Fusion de trous noirs : un code pour retracer l’histoire d’une vie stellaire

Simulation numérique d’une fusion de la binaire de trous noirs GW150914

Publication par Virgo et LIGO du catalogue GWTC-2 contenant 39 détections

Disentangling astrophysical populations of GW signals and characterizing their properties with LISA

LISA is a space-based gravitational wave (GW) observatory which is planned for launch in 2034. It consists of three satellites in the free fall in the heliocentric orbit forming an equilateral triangle. Satellites exchange the laser light forming transponding interferometry allowing to detect GWs in the mHz band. A plethora of gravitational-wave signals from different astrophysical sources is expected to be observed by LISA. These sources include galactic white dwarf binaries, extreme mass-ratio inspirals, massive black hole binaries, etc.

The advanced Virgo + project: improving the sensitivity of the gravitational-wave detector Virgo

Second generation gravitational wave (GW) detectors opened the era of gravitational wave astronomy with the fist GW detection in 2015 and are now approaching their design sensitivity. During the 3 past observation runs, they detected 15 GW signals produced by the merging of binary compact objects, providing a wealth of scientific results ranging from the general relativity, to astrophysics and cosmology.

Development of a detector for earthquakes gravity-signals based on techniques used in gravitational-wave detectors

Earthquakes are the most dangerous natural hazard and one of the least-understood processes that shape our planet. In the conventional paradigm, the first messengers of the occurrence of an earthquake are the seismic P-waves, propagating at the speed of sound in rocks, a few km/s.

Stage A lunar sensor network for gravitational was and geoscientific studies

This stage, will be concentrated on the scientific potential and the technical possibilities of a distributed network on the lunar surface, in order to a) detect Gravitational Waves (GW) b) perform a detailed seismological study of the moon, including the precise determination of its inner structure, c) eventually detect acoustically High Energy Cosmic rays impacting on the moon surface.

LISA: Cosmography with merging massive black hole binaries

LISA is space-based gravitational wave (GW) observatory which is planned for launch in 2034. It consists of three satellites in the free fall in heliocentric orbit forming equilateral triangle. Satellites exchange the laser light forming transponding interferometry allowing to detect GWs in the mHz band. One of the prime (and strongest) sources in the LISA data are the merging massive black hole binaries.
Detecting and characterizing those binaries should enable us to infer the channel of their formation and

Gravitation