A fourth-order hydrodynamics solver in SACRA-MPI reduces binary neutron star inspiral gravitational-wave phase error at merger from about 0.58 to 0.27 radians, while measured convergence order stays near 2.1-2.4.
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Towards high-precision inspiral gravitational waveforms from binary neutron star mergers in numerical relativity
A fourth-order hydrodynamics solver in SACRA-MPI reduces binary neutron star inspiral gravitational-wave phase error at merger from about 0.58 to 0.27 radians, while measured convergence order stays near 2.1-2.4.