Population synthesis of young isolated neutron stars: the effect of fallback disk accretion and magnetic field evolution

Abstract

The spin evolution of isolated neutron stars (NSs) is dominatd by their magnetic fields. The measured braking indices of young NSs show that the spin-down mechanism due to magnetic dipole radiation with constant magnetic fields is inadequate. Assuming that the NS magnetic field is buried by supernova fallback matter and re-emerges after accretion stops, we carry out Monte-Carlo simulation of the evolution of young NSs, and show that most of the pulsars have the braking indices ranging from -1 to 3. The results are compatible with the observational data of NSs associated with supernova remnants. They also suggest that the initial spin periods of NSs might occupy a relatively wide range.

26 pages, 6 figures, accepted by ApJ

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Cited by in corpus (15)

• Long-period Pulsars as Possible Outcomes of Supernova Fallback Accretion
• Rotational evolution of magnetars in the presence of a fallback disk
• Pulsar braking: magnetodipole vs. wind
• Is the Birth of PSR J0538+2817 Accompanied by a Gamma-ray Burst?
• Supernova luminosity powered by magnetar-disk system
• Discussions on the nature of GLEAM-X J162759.5-523504.3
• Rotational Evolution of The Slowest Radio Pulsar PSR J0250+5854
• The evolution of a newborn millisecond magnetar with a propeller-recycling disk
• On the fallback disk around the slowest isolated pulsar, 1E 161348$-$5055
• X-ray Flares Raising upon Magnetar Plateau as an Implication of a Surrounding Disk of Newborn Magnetized Neutron Star
• On the long-term evolution of rotating radio transients
• Unifying neutron star sub-populations in the supernova fallback accretion model
• Is PSR J0726-2612 a dim isolated neutron star progenitor?
• Investigating the neutron star physics through observations of several young pulsars in the dipole-field re-emergence scenario
• Evolution of Crab Pulsar: Magnetic Inclination Angle and Spin