Date: 28.02.2023

Marek Szczepanczyk (Uni.Florida)

Observational constraints of the core-collapse supernova engine with the gravitational-wave data

Abstract:
Core-collapse supernovae are violent explosions of massive stars. The next supernova in our Milky Way will be one of the most important astronomical events of the century. While astronomers observe them daily in distant galaxies, the mechanism driving the explosion is still unknown. Gravitational waves and neutrinos are the only means directly probing the central engines of these spectacular events. With the advent of Advanced LIGO-Virgo, we can constrain the supernova central engine observationally for the first time. I will present the results of the search for gravitational waves in the data from the third observing run of LIGO-Virgo. We analyzed the supernovae observed optically at distances up to 30 Mpc. We have not found any gravitational waves, so we provide upper limits on the emitted gravitational wave energy and power. For a population of the analyzed supernovae, we constrain the possible core deformation and exclude parameter space of extreme emission models.