论文标题
在扩展的相空间方法中的不同校正图的性能用于旋转紧凑的二进制
Performance of different correction maps in the extended phase-space method for spinning compact binaries
论文作者
论文摘要
自从Ligo/处女座团队首次检测引力波以来,相关研究领域吸引了更多的关注。相关研究人员广泛研究了旋转的紧凑型二进制系统,作为宽带激光干涉仪的重力波源之一。为了使用匹配的滤波技术分析重力波信号,需要可靠的数值算法。牛顿后(PN)天体力学中旋转的紧凑型二进制系统具有不可分割的哈密顿式。扩展的相空间算法是解决该系统问题的有效解决方案。我们在以前的工作中为扩展相位方法开发了校正图,这仅通过动量尺度因子显着提高了该方法的准确性和稳定性。在本文中,我们将添加更多的比例因子来修改数值解决方案,以最大程度地减少运动常数中的误差。但是,我们发现这些校正图将导致混乱轨道中哈密顿量的中断的巨大能量偏差,其潜力和动能等是不准确的。我们开发了新的校正图,以减少哈密顿量的减少的能量偏差,相反,该图可以提高数值解决方案的准确性,并为在其他算法中的歧管校正应用提供了新的想法。
Since the first detection of gravitational waves by the LIGO/VIRGO team, the related research field has attracted more attention. The spinning compact binaries system, as one of the gravitational-wave sources for broadband laser interferometers, has been widely studied by related researchers. In order to analyze the gravitational wave signals using matched filtering techniques, reliable numerical algorithms are needed. Spinning compact binaries systems in Post-Newtonian (PN) celestial mechanics have an inseparable Hamiltonian. The extended phase-space algorithm is an effective solution for the problem of this system. We have developed correction maps for the extended phase-space method in our previous work, which significantly improves the accuracy and stability of the method with only a momentum scale factor. In this paper, we will add more scale factors to modify the numerical solution in order to minimize the errors in the constants of motion. However, we find that these correction maps will result in a large energy bias in the subterms of the Hamiltonian in chaotic orbits, whose potential and kinetic energy, etc. are calculated inaccurately. We develop new correction maps to reduce the energy bias of the subterms of the Hamiltonian, which can instead improve the accuracy of the numerical solution and also provides a new idea for the application of the manifold correction in other algorithms.