21.05.2021
Sala I-net 12:00 
Seminarium Instytutu

Marek Szczepańczyk (Florida)

Gravitational waves from the next galactic core-collapse supernova

Core-collapse supernovae (CCSNe) are one of the most spectacular phenomena known in the Universe. While we know that they are explosions of massive stars, the mechanism of these explosions is not yet well understood. The detection of gravitational waves (GWs) will allow to directly probe the CCNS engine, helping to understand the explosion mechanism and shed light on the other questions about the nature of these phenomena. I will present a detailed study of a wide range of GW signatures derived from the multidimensional CCSN simulations. Then, I will provide prospects of detecting GWs with the advanced GW detectors, indicating that the signals from neutrino-driven explosions and the explosions from the rapidly rotating progenitors could be detected up to an average distance of 10 kpc and 100 kpc, respectively, and an estimated minimum signal-to-noise ratio of 10-25 is needed for the signals to be detected. I will discuss the accuracy and the challenges of reconstructing the waveforms. Finally, I will talk about how well particular emission processes in CCSN can be reconstructed for a detected GW signal.