Speaker
Alphonse MOREAU
Description
When a massive star dies, the collapse of its core forms a proto-neutron star. The accreting envelope creates a hydrodynamical shock that stalls after a few hundred milliseconds. The growth of the Standing Accretion Shock Instability (SASI) contributes to the asymmetric character of the explosion, the production of gravitational waves and a modulation of the neutrino signal.
In preparation for the next Galactic supernova, we analyse the multi-messenger signal in numerical models of the explosion to better understand SASI and the explosion mechanism. A numerical analysis is used to characterize to radial location of the region of emission of SASI induced gravitational waves.