Movies of Numerical Relativity Simulations
created by Kenta Kiuchi and Tomohide Wada.
Compact binary merger simulations in the framework of numerical relativity



Binary magnetized neutron star merger simulation
General relativistic magnetohydrodynamics and fixed mesh refinement are implemented.
Equation of state is H4 (N. K. Glendenning and S. A. Moszkowski 1991) and total mass is 2.7 solar mass.
The finest resolution is 70 and 110 meter and the simulation has been performed on the Japanese supercomputer K.


Density iso-surface with the magnetic field lines.
The dark blue represents 10^10 g/cc and light blue does 10^10.5 g/cc.
The black hole resides at the center.
Animation (110m 120 MB)
Animation (70m 120 MB)

Ref.) Kenta Kiuchi, Koutarou Kyutoku, Yuichiro Sekiguchi, Masaru Shibata, and Tomohide Wade, PRD 90, 041502 (R) (2014)


Black hole-magnetized neutron star merger simulation
General relativistic magnetohydrodynamics and fixed mesh refinement algorithm are implemented.
Equation of state, neutron star mass, mass ratio of BH to NS, and, BH spin are APR4, 1.35 solar mass, 4, and 0.75, respectively.
The finest resolution is 120 meter and the number of the grid point is 1028×1028×1028 in a refinement level.
The simulation has been performed on the Japanese supercomputer K.


Density iso-surface after tidal disruption.
Yellow, green, and blue color represent 10^11, 10^10, and 10^9 g/cc, respectively.
Animation for density (49 MB)
Animation for B-fields (49 MB)

Ref.) Kenta Kiuchi, Yuichiro Sekiguchi, Koutarou Kyutoku, Masaru Shibata, Keisuke Taniguchi, and Tomohide Wade, PRD, (2015)


Kelvin-Helmholtz instability in binary neutron star merger
Equation of state is H4 (N. K. Glendenning and S. A. Moszkowski 1991) and total mass is 2.8 solar mass.
The finest resolution is 17.5 meter and the number of the grid point is 1024×1024×512 in a refinement level.
The simulation has been performed on the Japanese supercomputer K.


Contact interface at the merger.

Animation for density field with 17.5 m resolution (38 MB)
Animation for density field with 37.5 m resolution (38 MB)
Animation for density field with 75 m resolution (38 MB)
Animation for density field with 150 m resolution (38 MB)


Ref.) Kenta Kiuchi, Pablo Cerda-Duran, Koutarou Kyutoku, Yuichiro Sekiguchi, and Masaru Shibata submitted to PRD