2008

Simulating coalescing compact binaries by a new code SACRA

Yamamoto, Tetsuro, Shibata, Masaru, Taniguchi, Keisuke

Understand

We report our new code (named SACRA) for numerical relativity simulations in which an adaptive mesh refinement algorithm is implemented.

In this code, the Einstein equations are solved in the BSSN formalism with a fourth-order finite differencing, and the hydrodynamic equations are solved by a third-order high-resolution central scheme.
The fourth-order Runge-Kutta scheme is adopted for integration in time.
To test the code, simulations for coalescence of black hole-black hole (BH-BH), neutron star-neutron star (NS-NS), and black hole-neutron star (BH-NS) binaries are performed, and also, properties of BHs formed after the merger and gravitational waveforms are compared among those three cases.

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