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Observing mergers ofnonspinningblack-hole binaries Sean T. McWilliamsBernard KellyJohn G. Baker2010 год

Observing mergers of nonspinning black-hole binaries
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Аннотация: Advances in the field of numerical relativity now make it possible to calculate the final, most powerful merger phase of binary black-hole coalescence for generic binaries. The state of the art has advanced well beyond the equal-mass case into the unequal-mass and spinning regions of parameter space. We present a study of the nonspinning portion of parameter space, primarily using an analytic waveform model tuned to available numerical data, with an emphasis on observational implications. We investigate the impact of varied mass-ratio on merger signal-to-noise ratios for several detectors, and compare our results with expectations from the test-mass limit. We note a striking similarity of the waveform phasing of the merger waveform across the available mass ratios. Motivated by this, we calculate the match between our 1:1 (equal-mass) and 4:1 mass-ratio waveforms during the merger as a function of location on the source sky, using a new formalism for the match that accounts for higher harmonics. This is an indicator of the amount of degeneracy in mass-ratio for mergers of moderate-mass-ratio systems.
Год издания: 2010
Авторы: Sean T. McWilliams, Bernard Kelly, John G. Baker
Издательство: American Physical Society
Источник: Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D, Particles, fields, gravitation, and cosmology
Ключевые слова: Pulsars and Gravitational Waves Research, Astrophysical Phenomena and Observations, Model Reduction and Neural Networks
Другие ссылки: Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D, Particles, fields, gravitation, and cosmology (HTML)
arXiv (Cornell University) (PDF)
arXiv (Cornell University) (HTML)
NASA STI Repository (National Aeronautics and Space Administration) (PDF)
NASA STI Repository (National Aeronautics and Space Administration) (HTML)
DataCite API (HTML)