GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
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Abstract
On August 17, 2017 at 12∶41:04 UTC the Advanced LIGO and Advanced Virgo gravitational-wave detectors made their first observation of a binary neutron star inspiral. The signal, GW170817, was detected with a combined signal-to-noise ratio of 32.4 and a false-alarm-rate estimate of less than one per 8.0×10^{4} years. We infer the component masses of the binary to be between 0.86 and 2.26 M_{⊙}, in agreement with masses of known neutron stars. Restricting the component spins to the range inferred in binary neutron stars, we find the component masses to be in the range 1.17-1.60 M_{⊙}, with the total mass of the system 2.74_{-0.01}^{+0.04}M_{⊙}. The source was localized within a sky region of 28 deg^{2} (90% probability) and had a luminosity distance of 40_{-14}^{+8} Mpc, the closest and most precisely localized gravitational-wave signal yet. The association with the γ-ray burst GRB 170817A, detected by Fermi-GBM 1.7 s after the coalescence, corroborates the hypothesis of a neutron star merger and provides the first direct evidence of a link between these mergers and short γ-ray bursts. Subsequent identification of transient counterparts across the electromagnetic spectrum in the same location further supports the interpretation of this event as a neutron star merger. This unprecedented joint gravitational and electromagnetic observation provides insight into astrophysics, dense matter, gravitation, and cosmology.
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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
- National Research, Development and Innovation OfficeConselleria d'Educació, Investigació, Cultura i EsportAustralian Research CouncilSchweizerischer Nationalfonds zur Förderung der Wissenschaftlichen ForschungMinistério da Ciência, Tecnologia e InovaçãoScience and Technology Facilities CouncilInstituto Nazionale di Fisica NucleareJet Propulsion LaboratoryUniversitat de les Illes BalearsNatural Sciences and Engineering Research Council of CanadaMinistry of Education, IndiaNarodowe Centrum NaukiScottish Universities Physics AllianceNational Natural Science Foundation of ChinaNational Research Foundation of KoreaHungarian Scientific Research FundGeneralitat ValencianaNational Aeronautics and Space AdministrationIndustry CanadaKavli FoundationGovern de les Illes BalearsAgencia Estatal de InvestigaciónRussian Foundation for Basic ResearchResearch Grants Council, University Grants CommitteeMax-Planck-GesellschaftEuropean Regional Development FundICTP South American Institute for Fundamental ResearchCentre National de la Recherche ScientifiqueCouncil of Scientific and Industrial Research, IndiaNemzeti Kutatási Fejlesztési és Innovációs HivatalNational Research FoundationRussian Science FoundationEuropean CommissionLeverhulme TrustScottish Funding CouncilCanadian Institute for Advanced ResearchDivision of Human Resource DevelopmentMinistero dello Sviluppo EconomicoInstitut des Origines de LyonDepartment of Science and Technology, Ministry of Science and Technology, IndiaStichting voor Fundamenteel Onderzoek der MaterieNederlandse Organisatie voor Wetenschappelijk OnderzoekMinistry of Science and Technology of the People's Republic of ChinaIstituto Nazionale di Fisica NucleareOntario Ministry of Economic Development and InnovationScience and Engineering Research BoardNational Science FoundationRoyal SocietyCalifornia Institute of TechnologyAbdus Salam International Centre for Theoretical Physics
- Keywords
- Neutron starGravitational wavePhysicsBinary numberAstrophysicsX-ray binaryLIGOBinary starStar (game theory)AstronomyStars
- Has abstract in OpenAlex
- yes