Point-symmetric morphology in supernova remnant G11.2-0.3: the jittering jets explosion mechanism

Abstract: I identify a point-symmetric morphology in the core-collapse supernova (CCSN) remnant SNR G11.2-0.3 composed of three pairs of opposite morphological features, and attribute their shaping to three energetic pairs of jets during the explosion process in the frame of the jittering jets explosion mechanism (JJEM). The pairs of morphological features are two opposite rings, a strip of dense ejecta extending on both sides of the central pulsar PSR J1811-1925, and an ear-nozzle opposite structure. According to the JJEM, additional weaker pairs of jets may also have participated in the explosion. The jets' axis from the ear to the nozzle coincides with the axis of the presently active pulsar jets, which is the pulsar spin axis. The jets of this pair were the last that the newly born neutron star launched during the explosion, and the accretion disk that launched these jets spun up the neutron star in the same direction as the jets. The identification of a point-symmetric morphology in SNR G11.2-0.3 strengthens the claim that the JJEM is the primary explosion mechanism of CCSNe.