General Relativistic Simulations of Accretion Induced Collapse of Neutron Stars to Black Holes

Abstract

Neutron stars (NSs) in the astrophysical universe are often surrounded by accretion disks. Accretion of matter onto an NS may increase its mass above the maximum value allowed by its equation of state, inducing its collapse to a black hole (BH). Here we study this process for the first time, in three-dimensions, and in full general relativity. By considering three initial NS configurations, each with and without a surrounding disk (of mass ~7% M_{NS}), we investigate the effect of the accretion disk on the dynamics of the collapse and its imprint on both the gravitational wave (GW) and electromagnetic (EM) signals that can be emitted by these sources. We show in particular that, even if the GW signal is similar for the accretion induced collapse (AIC) and the collapse of an NS in vacuum (and detectable only for Galactic sources), the EM counterpart could allow us to discriminate between these two types of events. In fact, our simulations show that, while the collapse of an NS in vacuum leaves no appreciable baryonic matter outside the event horizon, an AIC is followed by a phase of rapid accretion of the surviving disk onto the newly formed BH. The post-collapse accretion rates, on the order of ~10^{-2} M_{sun} s^{-1}, make these events tantalizing candidates as engines of short gamma-ray bursts.

arXiv comment6 pages, 3 figures. Minor changes to match version published on The Astrophysical Journal Letters

References in corpus (32)

• Observations of Accreting Pulsars
• Evolutions in 3D numerical relativity using fixed mesh refinement
• The Einstein Toolkit: A Community Computational Infrastructure for Relativistic Astrophysics
• Rotating Stars in Relativity
• Comparing Models of Rapidly Rotating Relativistic Stars Constructed by Two Numerical Methods
• The missing link: Merging neutron stars naturally produce jet-like structures and can power short Gamma-Ray Bursts
• Short Gamma-Ray Bursts with Extended Emission
• Efficient acceleration and radiation in Poynting flux powered GRB outflows
• Three-dimensional relativistic simulations of rotating neutron-star collapse to a Kerr black hole
• GRB Radiative Efficiencies Derived from the Swift Data: GRBs vs. XRFs, Long vs. Short
• Flares in long and short Gamma-Ray Bursts: a common origin in a hyperaccreting accretion disk
• Accurate evolutions of unequal-mass neutron-star binaries: properties of the torus and short GRB engines
• Relativistic outflows from remnants of compact object mergers and their viability for short gamma-ray bursts
• Recoil velocities from equal-mass binary black-hole mergers: a systematic investigation of spin-orbit aligned configurations
• Accurate evolutions of inspiralling and magnetized neutron-stars: equal-mass binaries
• The late time evolution of Gamma-Ray Bursts: ending hyperaccretion and producing flares
• WhiskyMHD: a new numerical code for general relativistic magnetohydrodynamics
• Evolution of magnetized, differentially rotating neutron stars: Simulations in full general relativity
• The Lazarus project: A pragmatic approach to binary black hole evolutions
• Construction of Highly Accurate Models of Rotating Neutron Stars - Comparison of Three Different Numerical Schemes
• Emission Spectra of Fallback Disks Around Young Neutron Stars
• Collapse of magnetized hypermassive neutron stars in general relativity
• Challenging the paradigm of singularity excision in gravitational collapse
• Collapse of differentially rotating neutron stars and cosmic censorship
• Axisymmetric general relativistic hydrodynamics: Long-term evolution of neutron stars and stellar collapse to neutron stars and black holes
• On the gravitational radiation from the collapse of neutron stars to rotating black holes
• The runaway instability of thick discs around black holes. II. Non constant angular momentum discs
• Stability and collapse of rapidly rotating, supramassive neutron stars: 3D simulations in general relativity
• X-ray flare candidates in short gamma-ray bursts
• Axisymmetric General Relativistic Simulations of the Accretion-Induced Collapse of White Dwarfs
• Gravitational-Wave Emission from Rotating Gravitational Collapse in three Dimensions
• Collapse of Neutron Stars to Black Holes in Binary Systems: A Model for Short Gamma Ray Bursts

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• Neutron star collapse and gravitational waves with a non-convex equation of state
• Mergers of Equal-Mass Binaries with Compact Object Companions from Mass Transfer in Triple Star Systems
• Increasing the Accuracy of Binary Neutron Star Simulations with an improved Vacuum Treatment
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