TAPIR Seminar

In person: 370 Cahill. To Join via Zoom: 851 0756 7442

Abstract: I will present evidence in core-collapse supernova remnants for the action of jets in the supernova explosion process. Two main types of observations appear in many, but not all, core-collapse supernova remnants: (i) the well-established presence of a pair of opposite `ears' and (ii) the recently identified point-symmetrical structure in 16 remnants, including SN 1987A, Cassiopeia A, Vela, and the Crab Nebula. The pair of opposite ears suggests that two opposite jets inflate the ears. The point-symmetrical structure results from two or more pairs of jets along different axes, as the jittering jets explosion mechanism (JJEM) predicts. Recently, we identified two photospheric shells in SN 2023ixf and SN 2024ggi, which we can explain with the JJEM. I will compare the JJEM with the neutrino-driven mechanism and conclude that the latter falls short of explaining observations, leaving the JJEM as the primary explosion mechanism of CCSNe.