2020/01/31 by Alessandro Nagar, Gunnar Riemenschneider, Geraint Pratten +2
Physics and Astronomy · #gr-qc
paper · pdf · doi:10.1103/physrevd.102.024077
published as Phys. Rev. D 102, 024077 (2020) · 45 pages, 21 figures, several changes with respect to the earlier version. Matches published version
arxiv created 2020/09/13 · arxiv updated 2020/09/15
We introduce \TEOBiResumSM, an improved version of the effective-one-body (EOB) waveform model \TEOBResumS for spin-aligned, coalescing black hole binaries, that includes subdominant gravitational waveform modes completed through merger and ringdown. Beyond the dominant (ℓ,|m|)=(2,2) one, the more robust multipoles all over the parameter space are: (2,1), (3,3), (3,2), (4,4) and (5,5). The multipolar ringdown EOB waveform stems from suitably fitting many numerical relativity (NR) waveform data from the Simulating eXtreme Spacetimes (SXS) collaboration together with test-mass waveform data. Mode-mixing effects are not incorporated. The orbital (nonspinning) part of the multipolar waveform amplitudes includes test-mass results up to (relative) 6PN order and, for most modes,is Padé resummed. The m=odd waveform multipoles (up to ℓ=5) incorporate most of the currently available spin-dependent analytical information. Improving on previous work, we confirm that certain m=odd modes, e.g. the (2,1), and even the (3,1), may develop a zero (or a minimum) in the amplitude for nearly equal-mass binaries and for several combinations of the individual spins. A remarkable EOB/NR agreement around such zero is found for these modes. The new waveform, and radiation reaction, prompts a new NR-calibration of the spinning sector of the model, done with only 32 datasets.The maximum (2,2) EOB/NR unfaithfulness F with Advanced LIGO noise against the SXS catalog (∼ 595 datasets) is always below 0.5% for binaries with total mass M as 10M_\odot≤ M ≤ 200M_\odot, except for a single outlier with max(F)∼ 0.85%. When (2,1), (3,3) and (4,4) modes are included, one finds an excellent EOB/NR agreement up to M∼ 120M_\odot, above which the performance degrades slightly and moves above 3%