Context:
The context of this PhD is the study of different aspects in late-time cosmology and gravity in the context of ground-based detectors such as LIGO and Virgo and in particular future 3rd generation detectors such as Einstein telescope (ET).
Le projet LISA de détection des ondes gravitationnelles a été sélectionné comme mission ‘Large’ de l’ESA au printemps 2017, pour un lancement prévu en 2034. Cette mission repose sur la capacité à mesurer, par interférométrie optique, l’amplitude des fluctuations de la distance entre trois satellites distants de 2.5 Mkm avec une précision picométrique sur des périodes de temps de quelques secondes à quelques heures.
In this project we will study a particular problem in Gravitational Waves (GWs) astronomy. While the GW sources which are currently detected with LIGO and VIRGO are rare and of short duration, some GW signals expected in the
The first detection of gravitational waves (GWs) from coalescing binary black holes by the
LIGO-VIRGO scientific collaboration has opened a new era in astrophysics: gravitational wave
astronomy. The ground based detectors operate at high frequencies (above 10 Hz), and there are
two major world-wide efforts to detect GW st low frequency. The GWs in the nano-Hz band will
be detected with the Pulsar Timing Array (PTA).
Here we use nature-provided detector: we monitor ultra-stable millisecond pulsars which work
The Laser Interferometer Space Antenna (LISA) is a large mission of the European Space Agency. It will address the scientific theme of "The Gravitational Universe" by observing gravitational waves sources emitting between 0.02 milliHertz and 1 Hertz. LISA is formed by tree spacecrafts on heliocentric orbits exchanging laser beams over 2.5 millions kilometers in order to measure the deformation of spacetime of few pico-meters due to gravitational waves.
