Extended Data Fig. 1: \(P-\dot{P}\) diagram showing the spin-period against the period derivative for neutron stars as reported in the ATNF pulsar catalog, and published long period transients.

Lines of constant age and magnetic field for neutron stars are shown as dotted and dashed lines respectively. The lower right region of the figure bounded by the various death lines represents the ‘death valley’ where sources below these lines are not expected to emit in the radio. The solid death line represents Equation 9 in³⁷. In dot-dashed and dashed are the death lines modeled on curvature radiation from the vacuum gap and SCLF models as shown by Equations 4 and 9 respectively in³⁸.