Approaching the Post-Newtonian Regime with Numerical Relativity: A Compact-Object Binary Simulation Spanning 350 Gravitational-Wave Cycles

作者：Szilagyi Bela^*; Blackman Jonathan; Buonanno Alessandra; Taracchini Andrea; Pfeiffer Harald P; Scheel Mark A; Chu Tony; Kidder Lawrence E; Pan Yi

来源：Physical Review Letters, 2015, 115(3): 031102.

DOI：10.1103/PhysRevLett.115.031102

We present the first numerical-relativity simulation of a compact-object binary whose gravitational waveform is long enough to cover the entire frequency band of advanced gravitational-wave detectors, such as LIGO, Virgo, and KAGRA, for mass ratio 7 and total mass as low as 45.5 M-circle dot. We find that effective-one-body models, either uncalibrated or calibrated against substantially shorter numerical-relativity waveforms at smaller mass ratios, reproduce our new waveform remarkably well, with a negligible loss in detection rate due to modeling error. In contrast, post-Newtonian inspiral waveforms and existing calibrated phenomenological inspiral-merger-ringdown waveforms display greater disagreement with our new simulation. The disagreement varies substantially depending on the specific post-Newtonian approximant used.

• 出版日期2015-7-16