GRAVITATIONAL RADIATION FROM MAGNETICALLY FUNNELED SUPERNOVA FALLBACK ONTO A MAGNETAR

摘要

Protomagnetars spun up to millisecond rotation periods by supernova fallback are predicted to radiate gravitational waves via hydrodynamic instabilities for ~102 s before possibly collapsing to form a black hole. It is shown that magnetic funneling of the accretion flow (1) creates a magnetically confined polar mountain, which boosts the gravitational wave signal, and (2) "buries" the magnetic dipole moment, delaying the propeller phase and assisting black hole formation.