Modeling GW170817 based on numerical relativity and its implications

  title={Modeling GW170817 based on numerical relativity and its implications},
  author={Masaru Shibata and Sho Fujibayashi and Kenta Hotokezaka and Kenta Kiuchi and Koutarou Kyutoku and Yuichiro Sekiguchi and Masaomi Tanaka},
  journal={Physical Review D},
Gravitational-wave observation together with a large number of electromagnetic observations shows that the source of the latest gravitational-wave event, GW170817, detected primarily by advanced LIGO, is the merger of a binary neutron star. We attempt to interpret this observational event based on our results of numerical-relativity simulations performed so far paying particular attention to the optical and infra-red observations. We finally reach a conclusion that this event is described… 

Figures and Tables from this paper

Full transport model of GW170817-like disk produces a blue kilonova
The 2017 detection of the inspiral and merger of two neutron stars in gravitational waves and gamma rays was accompanied by a quickly-reddening transient. Such a transient was predicted to occur
Magnetically Inspired Explosive Outflows from Neutron-star Mergers
Binary neutron-star mergers have long been associated with short-duration gamma-ray bursts (GRBs). This connection was confirmed with the first coincident detection of gravitational waves together
GW170817, general relativistic magnetohydrodynamic simulations, and the neutron star maximum mass.
Recent numerical simulations in general relativistic magnetohydrodynamics (GRMHD) provide useful constraints for the interpretation of the GW170817 discovery, leading to a bound on the maximum mass of a cold, spherical neutron star (the TOV limit): Mmaxsph≲2.74/β.
Nuclear physics aspects of the GW170817 neutron star merger event
Abstract The detection of the GW170817 neutron star merger event by the Advanced LIGO and Virgo collaborations has stimulated an intense research activity regarding novel aspects of nuclear physics,
Jet Propagation in Neutron Star Mergers and GW170817
The gravitational wave event from the binary neutron star (BNS) merger GW170817 and the following multi-messenger observations present strong evidence for i) merger ejecta expanding with substantial
Model comparison from LIGO–Virgo data on GW170817’s binary components and consequences for the merger remnant
GW170817 is the very first observation of gravitational waves originating from the coalescence of two compact objects in the mass range of neutron stars, accompanied by electromagnetic counterparts,
GW170817: Measurements of Neutron Star Radii and Equation of State.
This analysis expands upon previous analyses by working under the hypothesis that both bodies were neutron stars that are described by the same equation of state and have spins within the range observed in Galactic binary neutron stars.
Gravitational-wave astrophysics from neutron star inspiral and coalescence
  • J. Friedman
  • Physics
    International Journal of Modern Physics D
  • 2018
Prior to the observation of a double neutron star inspiral and merger, its possible implications were striking. Events whose light and gravitational waves are simultaneously detected could resolve
Inferring prompt black-hole formation in neutron star mergers from gravitational-wave data
The gravitational-wave GW170817 is associated to the inspiral phase of a binary neutron star coalescence event. The LIGO-Virgo detectors sensitivity at high frequencies was not sufficient to detect
The origin of polarization in kilonovae and the case of the gravitational-wave counterpart AT 2017gfo
The gravitational-wave event GW 170817 was generated by the coalescence of two neutron stars and produced an electromagnetic transient, labelled AT 2017gfo, that was the target of a massive


The unpolarized macronova associated with the gravitational wave event GW 170817
The merger of two dense stellar remnants including at least one neutron star is predicted to produce gravitational waves (GWs) and short-duration gamma ray bursts1,2. In the process, neutron-rich
A kilonova as the electromagnetic counterpart to a gravitational-wave source
Observations and physical modelling of a rapidly fading electromagnetic transient in the galaxy NGC 4993, which is spatially coincident with GW170817, indicate that neutron-star mergers produce gravitational waves and radioactively powered kilonovae, and are a nucleosynthetic source of the r-process elements.
Detectable radio flares following gravitational waves from mergers of binary neutron stars
Results of calculations are presented showing that the interaction of mildly relativistic outflows with the surrounding medium produces radio flares with peak emission at 1.4 gigahertz that persist at detectable (submillijansky) levels for weeks, out to a redshift of 0.1.
Low mass binary neutron star mergers : gravitational waves and neutrino emission
Neutron star mergers are among the most promising sources of gravitational waves for advanced ground-based detectors. These mergers are also expected to power bright electromagnetic signals, in the
Neutrino-driven winds from neutron star merger remnants
We present a detailed, three-dimensional hydrodynamic study of the neutrino-driven winds that emerge from the remnant of a neutron star merger. Our simulations are performed with the Newtonian,
Mergers of binary neutron stars (NSs) are among the most promising gravitational wave (GW) sources. Next generation GW detectors are expected to detect signals from NS mergers within about 200 Mpc.
The Emergence of a Lanthanide-Rich Kilonova Following the Merger of Two Neutron Stars
We report the discovery and monitoring of the near-infrared counterpart (AT2017gfo) of a binary neutron-star merger event detected as a gravitational wave source by Advanced Laser Interferometer
Spectral properties of the post-merger gravitational-wave signal from binary neutron stars
Extending previous work by a number of authors, we have recently presented a new approach in which the detection of gravitational waves from merging neutron star binaries can be used to determine the
Constraining the Maximum Mass of Neutron Stars from Multi-messenger Observations of GW170817
We combine electromagnetic (EM) and gravitational wave (GW) information on the binary neutron star (NS) merger GW170817 in order to constrain the radii $R_{\rm ns}$ and maximum mass $M_{\rm max}$ of
GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral.
The association of GRB 170817A, detected by Fermi-GBM 1.7 s after the coalescence, corroborates the hypothesis of a neutron star merger and provides the first direct evidence of a link between these mergers and short γ-ray bursts.