Tests of general relativity with GW150914

The LIGO Scientific Collaboration, Alberto Vecchio, Andreas Freise, Ilya Mandel, John Veitch, Walter Del Pozzo, Will Farr, Christopher Berry, Haixing Miao, Conor Mow-Lowry, Carl-Johan Haster, Hannah Middleton, Haoyu Wang, Edward Thomas, Anna Green, Serena Vinciguerra, Daniel Töyrä

Research output: Contribution to journalArticlepeer-review

776 Citations (Scopus)


The LIGO detection of GW150914 provides an unprecedented opportunity to study the two-body motion of a compact-object binary in the large-velocity, highly nonlinear regime, and to witness the final merger of the binary and the excitation of uniquely relativistic modes of the gravitational field. We carry out several investigations to determine whether GW150914 is consistent with a binary black-hole merger in general relativity. We find that the final remnant’s mass and spin, as determined from the low-frequency (inspiral) and high-frequency (postinspiral) phases of the signal, are mutually consistent with the binary black-hole solution in general relativity. Furthermore, the data following the peak of GW150914 are consistent with the least-damped quasinormal mode inferred from the mass and spin of the remnant black hole. By using waveform models that allow for parametrized general-relativity violations during the inspiral and merger phases, we perform quantitative tests on the gravitational-wave phase in the dynamical regime and we determine the first empirical bounds on several high-order post-Newtonian coefficients. We constrain the graviton Compton wavelength, assuming that gravitons are dispersed in vacuum in the same way as particles with mass, obtaining a 90%-confidence lower bound of 1013  km. In conclusion, within our statistical uncertainties, we find no evidence for violations of general relativity in the genuinely strong-field regime of gravity.
Original languageEnglish
Article number221101
Number of pages19
JournalPhysical Review Letters
Issue number22
Early online date31 May 2016
Publication statusPublished - 3 Jun 2016


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