Tests of General Relativity with GW150914
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Abstract
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 10^{13} km. In conclusion, within our statistical uncertainties, we find no evidence for violations of general relativity in the genuinely strong-field regime of gravity.
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The record
- Venue
- Physical Review Letters
- Topic
- Pulsars and Gravitational Waves Research
- Field
- Physics and Astronomy
- Canadian institutions
- Canadian Institute for Theoretical AstrophysicsUniversity of Toronto
- Funders
- Division of Human Resource DevelopmentAustralian Research CouncilScience and Technology Facilities CouncilIstituto Nazionale di Fisica NucleareNatural Sciences and Engineering Research Council of CanadaMinistry of Science and Technology, TaiwanMinistry of Education, IndiaNarodowe Centrum NaukiNational Research Foundation of KoreaRoyal SocietyMinisterio de Economía y CompetitividadCouncil of Scientific and Industrial Research, IndiaCentre National de la Recherche ScientifiqueIndustry CanadaGovern de les Illes BalearsNederlandse Organisatie voor Wetenschappelijk OnderzoekNational Research FoundationInstituto Nazionale di Fisica NucleareEuropean CommissionRussian Foundation for Basic ResearchCanadian Institute for Advanced ResearchMinistero dello Sviluppo EconomicoInstitut des Origines de LyonLeverhulme TrustScottish Funding CouncilScottish Universities Physics AllianceHungarian Scientific Research FundOntario Ministry of Economic Development and InnovationScience and Engineering Research BoardNational Science FoundationKavli FoundationResearch Corporation for Science Advancement
- Keywords
- PhysicsTests of general relativityGeneral relativityGravitonLIGOGravitational waveBlack hole (networking)Binary black holeNumerical relativityTheory of relativityQuasinormal modeGravitationClassical mechanicsAstrophysics
- Has abstract in OpenAlex
- yes