Seminar details
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.