Accurate evolutions of inspiralling and magnetized neutron-stars: equal-mass binaries
arXiv:1009.2468 · doi:10.1103/PhysRevD.83.044014
Abstract
By performing new, long and numerically accurate general-relativistic simulations of magnetized, equal-mass neutron-star binaries, we investigate the role that realistic magnetic fields may have in the evolution of these systems. In particular, we study the evolution of the magnetic fields and show that they can influence the survival of the hypermassive-neutron star produced at the merger by accelerating its collapse to a black hole. We also provide evidence that even if purely poloidal initially, the magnetic fields produced in the tori surrounding the black hole have toroidal and poloidal components of equivalent strength. When estimating the possibility that magnetic fields could have an impact on the gravitational-wave signals emitted by these systems either during the inspiral or after the merger we conclude that for realistic magnetic-field strengths B<~1e12 G such effects could be detected, but only marginally, by detectors such as advanced LIGO or advanced Virgo. However, magnetically induced modifications could become detectable in the case of small-mass binaries and with the development of gravitational-wave detectors, such as the Einstein Telescope, with much higher sensitivities at frequencies larger than ~2 kHz.
18 pages, 10 figures. Added two new figures (figures 1 and 7). Small modifications to the text to match the version published on Phys. Rev. D
References in corpus (17)
- Producing ultra-strong magnetic fields in neutron star mergers
- Accurate evolutions of inspiralling neutron-star binaries: prompt and delayed collapse to black hole
- Recoil velocities from equal-mass binary black-hole mergers: a systematic investigation of spin-orbit aligned configurations
- Magnetized Neutron Star Mergers and Gravitational Wave Signals
- General relativistic simulations of magnetized binary neutron star mergers
- WhiskyMHD: a new numerical code for general relativistic magnetohydrodynamics
- Accurate simulations of the dynamical bar-mode instability in full General Relativity
- Longterm general relativistic simulation of binary neutron stars collapsing to a black hole
- Simulating binary neutron stars: dynamics and gravitational waves
- Challenging the paradigm of singularity excision in gravitational collapse
- Can magnetic fields be detected during the inspiral of binary neutron stars?
- Relativistic magnetohydrodynamics in dynamical spacetimes: A new AMR implementation
- Three-Dimensional Relativistic MHD Simulations of the Kelvin-Helmholtz Instability: Magnetic Field Amplification by a Turbulent Dynamo
- Accurate evolutions of inspiralling neutron-star binaries: assessment of the truncation error
- Dynamical non-axisymmetric instabilities in rotating relativistic stars
- Collapse and black hole formation in magnetized, differentially rotating neutron stars
- Faraday resonance in dynamical bar instability of differentially rotating stars