Magnetic fileds of coalescing neutron stars and the luminosity function of short gamma-ray burst
arXiv:0909.2502 · doi:10.1134/S1063773709120020
Abstract
Coalescing neutron star binaries are believed to be the most reliable sources for ground-based detectors of gravitational waves and likely progenitors of short gamma-ray bursts. In the process of coalescence, magnetic fields of neutron stars can induce interesting observational manifestations and affect the form of gravitational wave signal. In this papaer we use the population synthesis method to model the expected distribution of neutron star magnetic fields during the coalescence under different assumptions on the initial parameters of neutron stars and their magnetic field evolution. We discuss possible elecotrmagnetic phenomena preceding the coalescence of magnetized neutron star binaries and the effect of magnetic field on the gravitational wave signal. We find that a log-normal (Gaussian in logarithms) distribution of the initial magnetic fields of neutron stars, which agrees with observed properties of radio pulsars, produces the distribution of the magnetic field energy during the coalescence that adequately describes the observed luminosity function of short gamma-ray bursts under different assumptions on the field evolution and initial parameters of neutron stars. This agreement lends further support to the model of coalescing neutron star binaries as progenitors of gamma-ray bursts.
v.2, LATEX, 25 pages, inc. 7 ps figures, Astron. Lett., in press. Typos corrected, reference added
References in corpus (15)
- A bright millisecond radio burst of extragalactic origin
- Short-Hard Gamma-Ray Bursts
- Magnetic acceleration of ultra-relativistic jets in gamma-ray burst sources
- General relativistic simulations of magnetized binary neutron star mergers
- Search for gravitational waves from binary inspirals in S3 and S4 LIGO data
- On non-axisymmetric magnetic equilibria in stars
- The Evolution of Compact Binary Star Systems
- Origin of neutron star magnetic fields
- Induced scattering of short radio pulses
- On the possible observational manifestation of supernova shock impact on the neutron star magnetosphere
- Pulsar spin-velocity alignment from single and binary neutron star progenitors
- Double Neutron Stars: Evidence For Two Different Neutron-Star Formation Mechanisms
- CCO Pulsars as Anti-Magnetars: Evidence of Neutron Stars Weakly Magnetized at Birth
- Neutron star spin-kick velocity correlation effect on binary neutron star coalescence rates and spin-orbit misalignment of the components
- Quasi-Local Energy Flux of Spacetime Perturbation