# When will we observe binary black holes precessing

@article{Fairhurst2019WhenWW, title={When will we observe binary black holes precessing}, author={Stephen Fairhurst and Rhys E. Green and Mark Hannam and Charlie Hoy}, journal={arXiv: General Relativity and Quantum Cosmology}, year={2019} }

After eleven gravitational-wave detections from compact-binary mergers, we are yet to observe the striking general-relativistic phenomenon of orbital precession. Measurements of precession would provide valuable insights into the distribution of black-hole spins, and therefore into astrophysical binary formation mechanisms. We make use of our recent two-harmonic approximation of precessing-binary signals~\cite{Fairhurst:2019_2harm} to introduce the "precession signal-to-noise ratio", $\rho_p… CONTINUE READING

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