POPULATION SYNTHESIS OF YOUNG ISOLATED NEUTRON STARS: THE EFFECT OF FALLBACK DISK ACCRETION AND MAGNETIC FIELD EVOLUTION

Journal Article · Tue Oct 01 00:00:00 EDT 2013 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/775/2/124· OSTI ID:22270864

Fu, Lei; Li, Xiang-Dong ^[1]

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1. Department of Astronomy, Nanjing University, Nanjing 210093 (China)

The spin evolution of isolated neutron stars (NSs) is dominated 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 a Monte Carlo simulation of the evolution of young NSs, and show that most of the pulsars have 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.

• OSTI ID: 22270864
• Journal Information: Astrophysical Journal, Vol. 775, Issue 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ACCRETION DISKS
ASTRONOMY
ASTROPHYSICS
COMPUTERIZED SIMULATION
MAGNETIC DIPOLES
MAGNETIC FIELDS
MONTE CARLO METHOD
NEUTRON STARS
PULSARS
STAR EVOLUTION
SUPERNOVA REMNANTS