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arXiv 1307.6232gr-qc
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自旋旋进黑洞双星的有效单体形式的吸气合并振铃波形

Inspiral-merger-ringdown waveforms of spinning, precessing black-hole binaries in the effective-one-body formalism

Yi Pan, Alessandra Buonanno, Andrea Taracchini, Lawrence E. Kidder, Abdul H. Mroue, Harald P. Pfeiffer, Mark A. Scheel, Bela Szilagyi

摘要:

我们描述了一个通用的程序来产生自旋,进动波形,包括inspiral,合并和衰荡阶段的有效一体(EOB)的方法。该程序使用的进动框架中,进动引起的振幅和相位调制最小化,和惯性系,与自旋的最后黑洞,在其中我们进行了匹配的吸气暴跌合并振铃波形对齐。作为第一个应用程序,我们建立自旋,进动EOB波形的引力模式l=2,使在nonprecessing限制这些波形同意EOB波形最近校准的数值相对论波形。在不重新校准EOB模型的情况下,我们将EOB和后牛顿进动波形与Caltech-Cornell-CITA合作产生的两个数值相对论波形进行比较。数值波形有35个和65个重力波周期。我们发现EOB和数值相对论的旋进波形和自旋演化有着显著的一致性。合并时的相位差约为0.2 rad,而使用高级LIGO噪声谱密度计算的失配在仅在合并时的时间和相位以及偏振角上最大化时低于2%。

英文摘要:

We describe a general procedure to generate spinning, precessing waveforms that include inspiral, merger and ringdown stages in the effective-one-body (EOB) approach. The procedure uses a precessing frame in which precession-induced amplitude and phase modulations are minimized, and an inertial frame, aligned with the spin of the final black hole, in which we carry out the matching of the inspiral-plunge to merger-ringdown waveforms. As a first application, we build spinning, precessing EOB waveforms for the gravitational modes l=2 such that in the nonprecessing limit those waveforms agree with the EOB waveforms recently calibrated to numerical-relativity waveforms. Without recalibrating the EOB model, we then compare EOB and post-Newtonian precessing waveforms to two numerical-relativity waveforms produced by the Caltech-Cornell-CITA collaboration. The numerical waveforms are strongly precessing and have 35 and 65 gravitational-wave cycles. We find a remarkable agreement between EOB and numerical-relativity precessing waveforms and spins' evolutions. The phase difference is ~ 0.2 rad at merger, while the mismatches, computed using the advanced-LIGO noise spectral density, are below 2% when maximizing only on the time and phase at coalescence and on the polarization angle.

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