Etude de méthodes d'analyse en vue de détecter les ondes gravitationnelles émises par des pulsars avec l'interféromètre Virgo

摘要

Pulsars are one of the expected sources of gravitational waves for terrestrial interferometers. In the frequency range where the sensitivity should allow detections typically above 10 Hz , most of the known pulsars belong to a binary system. The frequency of the gravitational waves emitted by a pulsar in a binary system is Doppler-shifted due to several motions : the daily and yearly revolutions of the Earth, and the motion of the pulsar around its companion. This work presents the monitoring of the timing system of Virgo, the simulation of the signal emitted by pulsars in binary systems and two methods dedicated to the search for such objects. The principles, computational requirements and performances of both methods are detailed.