X-Ray Hardening Preceding the Onset of SGR 1935+2154's Radio Pulsar Phase
X-Ray Hardening Preceding the Onset of SGR 1935+2154's Radio Pulsar Phase
Abstract Magnetars are neutron stars with extremely strong magnetic fields, frequently powering high-energy activity in X-rays. Pulsed radio emission following some X-ray outbursts has been detected, albeit its physical origin is unclear. It has long been speculated that the origin of magnetars’ radio signals is different from those from canonical …