Noam Soker Technion, Israel

I analyze images of the Crab Nebula core-collapse supernova (CCSN) remnant in light of recent three-dimensional hydrodynamical simulations of the jittering-jets explosion mechanism (JJEM) and identify a southern ring opposite to the northern jet, which I attribute to a counterjet. The Crab Nebula is known for its point-symmetric morphology of seven pairs of bays and a pair of two filaments, but no pairs of two jets or their direct outcomes, like ears and rings, have been identified. I identify a ring in visible and infrared images of the Crab Nebula opposite to the prominent northern jet. Recent hydrodynamical simulations of the JJEM show that jets that explode CCSNe can form such circum-jet rings. I, therefore, attribute the shaping of the southern ring to a southern jet, a counter jet to the northern jet, both of which participated in the explosion of the Crab Nebula in the framework of the JJEM.