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Mass ejection from the merger of binary neutron stars
Numerical-relativity simulations for the merger of binary neutron stars are performed for a variety of equations of state (EOSs) and for a plausible range of the neutron-star mass, focusing primarilyExpand
Production of all the r-process nuclides in the dynamical ejecta of neutron star mergers
Recent studies suggest that binary neutron star (NS-NS) mergers robustly produce heavy r-process nuclei above the atomic mass number A ~ 130 because their ejecta consist of almost pure neutronsExpand
Dynamical mass ejection from the merger of asymmetric binary neutron stars: Radiation-hydrodynamics study in general relativity
EOS (DD2), with the increase of the mass asymmetry degree, the total ejecta mass signicantly increases while the average of Ye and s moderately decreases. We nd again that only for the soft EOSExpand
Modeling GW170817 based on numerical relativity and its implications
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 advancedExpand
Dynamical mass ejection from binary neutron star mergers: Radiation-hydrodynamics study in general relativity
We perform radiation-hydrodynamics simulations of binary neutron star mergers in numerical relativity on the Japanese "K" supercomputer, taking into account neutrino cooling and heating by an updatedExpand
An electromagnetic transient powered by the radioactive decay of r-process elements, a so-called kilonova/macronova, is one of the possible observable consequences of compact binary mergers includingExpand
The Japanese space gravitational wave antenna?DECIGO
DECi-hertz Interferometer Gravitational wave Observatory (DECIGO) is the future Japanese space gravitational wave antenna. It aims at detecting various kinds of gravitational waves between 1 mHz andExpand
Mass Ejection from the Remnant of a Binary Neutron Star Merger: Viscous-radiation Hydrodynamics Study
We perform long-term general relativistic neutrino radiation hydrodynamics simulations (in axisymmetry) for a massive neutron star (MNS) surrounded by a torus, which is a canonical remnant formedExpand
Truncated Moment Formalism for Radiation Hydrodynamics in Numerical Relativity
A truncated moment formalism for general relativistic radiation hydrodynamics, based on Thorne’s moment formalism, is derived. The fluid rest frame is chosen to be the fiducial frame for defining theExpand
Remnant massive neutron stars of binary neutron star mergers: Evolution process and gravitational waveform
Massive (hypermassive and supramassive) neutron stars are likely to be often formed after the merger of binary neutron stars. We explore the evolution process of the remnant massive neutron stars andExpand