Boundedness and Decay for the Teukolsky System in Kerr-Newman Spacetime II: The Case $|a|\ll M$, $|Q|<M$ in Axial Symmetry

Elena Giorgi, Jingbo Wan

We establish boundedness and polynomial decay results for the Teukolsky system in the exterior spacetime of very slowly rotating and strongly charged sub-extremal Kerr-Newman black…