Baker John G, Centrella Joan, Choi Dae-Il, Koppitz Michael, van Meter James
Gravitational Astrophysics Laboratory, NASA Goddard Space Flight Center, 8800 Greenbelt Road, Greenbelt, Maryland 20771, USA.
Phys Rev Lett. 2006 Mar 24;96(11):111102. doi: 10.1103/PhysRevLett.96.111102. Epub 2006 Mar 22.
We present new ideas for evolving black holes through a computational grid without excision, which enable accurate and stable evolutions of binary black hole systems with the accurate determination of gravitational waveforms directly from the wave zone region. Rather than excising the black hole interiors, our approach follows the "puncture" treatment of black holes, but utilizing a new gauge condition which allows the black holes to move successfully through the computational domain. We apply these techniques to an inspiraling binary, modeling the radiation generated during the final plunge and ringdown. We demonstrate convergence of the waveforms and good conservation of mass-energy, with just over 3% of the system's mass converted to gravitational radiation.
我们提出了在不进行切除的情况下通过计算网格演化黑洞的新想法，这使得能够精确且稳定地演化双黑洞系统，并直接从波区准确确定引力波波形。我们的方法不是切除黑洞内部，而是遵循黑洞的“穿刺”处理方式，但使用了一种新的规范条件，使黑洞能够成功穿过计算域。我们将这些技术应用于一个螺旋进动的双星系统，对最终下落和铃宕阶段产生的辐射进行建模。我们展示了波形的收敛性以及质量 - 能量的良好守恒性，系统质量仅有略超过3%转化为引力辐射。
