The LVK collaboration is opening up the field of gravitational wave astrophysics, with the direct detection of gravitational waves predicted by Einstein's General Theory of Relativity. To date, over 90 events have been detected, and a new observation period has just begun. In this presentation, we will review the principle of Bayesian inference for estimating the parameters of a compact object merger starting from a gravitational wave detection, an analysis step called “Parameter Estimation” within the LVK. In the case of a neutron star merger, this Bayesian analysis can take weeks, and a new method called ROQ has been developed to perform the analysis in a day. This opens up a wide range of study opportunities that would otherwise be inconceivable. Parameter estimation is the crucial step where physical information is extracted from gravitational wave observations. It improves, for example, our knowledge of nuclear physics through direct measurement of tidal deformability. In this presentation, we'll look at how to measure the equation of state of a neutron star, and the prospects for future generations of detectors.
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IP2I seminars are open to all UCBL and CNRS students and collaborators.
More information on seminars: https://intranet.ip2i.in2p3.fr/vie-scientifique/seminaires-ip2i
IP2I agenda: https://www.ip2i.in2p3.fr/agendav2/
