An Optically Targeted Search for Gravitational Waves emitted by Core-Collapse Supernovae during the Third Observing Run of LIGO and Virgo

Core-collapse supernovae (CCSNe) are violent explosions of massive stars and multimessenger astrophysical sources. Detecting gravitational waves (GWs) from these sources will allow direct probing of the engine driving explosion's dynamics. So far, no GWs from these explosions have been observed. The recent optically targeted search with the data from the first and second observing runs of LIGO and Virgo constrained the CCSN engine for the first time. In my talk, I will present the search results with the data from the third observing run of LIGO and Virgo, where we analyzed CCSN up to 30 Mpc. I will briefly describe the method and the GW candidates. In our analysis, we continue constraining the properties of the CCSN engine. I will report the upper limits on GW emission energy and power. I will provide an interpretation in terms of the core deformation. Finally, I will present the probabilities of excluding the extreme emission models.