GW190425: Observation of a Compact Binary Coalescence with Total Mass ∼ 3.4 M<sub>⊙</sub>
B. P. AbbottLIGO, California Institute of Technology, Pasadena, CA 91125, USAR. AbbottLIGO, California Institute of Technology, Pasadena, CA 91125, USAT. D. AbbottLouisiana State University, Baton Rouge, LA 70803, USAS. AbrahamInter-University Centre for Astronomy and Astrophysics, Pune 411007, IndiaF. AcerneseDipartimento di Farmacia, Università di Salerno, I-84084 Fisciano, Salerno, ItalyK. AckleyMonash UniversityC. AdamsLIGO Livingston Observatory, Livingston, LA 70754, USAR. X. AdhikariLIGO, California Institute of Technology, Pasadena, CA 91125, USAV. B. AdyaARC Centre of Excellence for Gravitational Wave DiscoveryC. AffeldtMax Planck Institute for Gravitational Physics (Albert Einstein Institute), D-30167 Hannover, GermanyM. AgathosTheoretisch-Physikalisches Institut, Friedrich-Schiller-Universität Jena, D-07743 Jena, GermanyK. AgatsumaUniversity of Birmingham, Birmingham B15 2TT, UKN. AggarwalLIGO, Massachusetts Institute of Technology, Cambridge, MA 02139, USAO. D. AguiarInstituto Nacional de Pesquisas Espaciais, 12227-010 São José dos Campos, São Paulo, BrazilL. AielloINFN, Laboratori Nazionali del Gran Sasso, I-67100 Assergi, ItalyA. AinInter-University Centre for Astronomy and Astrophysics, Pune 411007, IndiaP. AjithInternational Centre for Theoretical SciencesB. AllenNCSA, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USAA. AlloccaUniversità di Pisa, I-56127 Pisa, ItalyM. Á. AloyDepartamento de Astronomía y Astrofísica, Universitat de València, E-46100 Burjassot, València, SpainP. A. AltinOzGrav, Australian National University, Canberra, Australian Capital Territory 0200, AustraliaA. AmatoLaboratoire des Matériaux AvancésShreya AnandLIGO, California Institute of Technology, Pasadena, CA 91125, USAA. AnanyevaLIGO, California Institute of Technology, Pasadena, CA 91125, USAS. B. AndersonLIGO, California Institute of Technology, Pasadena, CA 91125, USAW. G. AndersonUniversity of Wisconsin-Milwaukee, Milwaukee, WI 53201, USAS. V. AngelovaSUPA, University of Strathclyde, Glasgow G1 1XQ, UKS. AntierDélégation Paris 7S. AppertLIGO, California Institute of Technology, Pasadena, CA 91125, USAK. AraiLIGO, California Institute of Technology, Pasadena, CA 91125, USAM. C. ArayaLIGO, California Institute of Technology, Pasadena, CA 91125, USAJ. S. AreedaCalifornia State University Fullerton, Fullerton, CA 92831, USAM. ArèneUniversité Paris CitéN. ArnaudUniversité Paris-SaclayS. M. AronsonUniversity of Florida, Gainesville, FL 32611, USAK. G. ArunChennai Mathematical Institute, Chennai 603103, IndiaS. AscenziGran Sasso Science Institute (GSSI), I-67100 L'Aquila, ItalyG. AshtonMonash UniversityS. M. AstonLIGO Livingston Observatory, Livingston, LA 70754, USAP. AstoneINFN, Sezione di Roma, I-00185 Roma, ItalyF. AubinUniversité Savoie Mont BlancP. AufmuthLeibniz Universität Hannover, D-30167 Hannover, GermanyK. AultONealEmbry-Riddle Aeronautical University, Prescott, AZ 86301, USAC. AustinLouisiana State University, Baton Rouge, LA 70803, USAV. AvendanoMontclair State University, Montclair, NJ 07043, USAA. Avila-AlvarezCalifornia State University Fullerton, Fullerton, CA 92831, USAS. BabakAPC, AstroParticule et Cosmologie, Université Paris Diderot, CNRS/IN2P3, CEA/Irfu, Observatoire de Paris, Sorbonne Paris Cité, F-75205 Paris Cedex 13, FranceP. BaconDélégation Paris 7F. BadaraccoGran Sasso Science Institute (GSSI), I-67100 L'Aquila, ItalyM. K. M. BaderNikhef, Science Park 105, 1098 XG Amsterdam, The NetherlandsS. BaeKorea Institute of Science and Technology Information, Daejeon 34141, Republic of KoreaJ. BairdCommissariat à l'Énergie Atomique et aux Énergies AlternativesP. T. BakerWest Virginia University, Morgantown, WV 26506, USAF. BaldacciniINFN, Sezione di Perugia, I-06123 Perugia, ItalyG. BallardinEuropean Gravitational Observatory (EGO), I-56021 Cascina, Pisa, ItalyS. W. BallmerSyracuse University, Syracuse, NY 13244, USAA. BalsEmbry-Riddle Aeronautical University, Prescott, AZ 86301, USAS. BanagiriUniversity of Minnesota, Minneapolis, MN 55455, USAJ. C. BarayogaLIGO, California Institute of Technology, Pasadena, CA 91125, USAC. BarbieriINFN, Sezione di Milano-Bicocca, I-20126 Milano, ItalyS. E. BarclaySUPA, University of Glasgow, Glasgow G12 8QQ, UKB. C. BarishLIGO, California Institute of Technology, Pasadena, CA 91125, USAD. BarkerK. BarkettCaltech CaRT, Pasadena, CA 91125, USAS. BarnumLIGO, Massachusetts Institute of Technology, Cambridge, MA 02139, USAF. BaroneDipartimento di Medicina, Chirurgia e Odontoiatria "Scuola Medica Salernitana," Università di Salerno, I-84081 Baronissi, Salerno, ItalyB. BarrSUPA, University of Glasgow, Glasgow G12 8QQ, UKL. BarsottiLIGO, Massachusetts Institute of Technology, Cambridge, MA 02139, USAM. BarsugliaDélégation Paris 7D. BartaWigner RCP, RMKI, H-1121 Budapest, Konkoly Thege Miklós út 29-33, HungaryJ. BartlettI. BartosUniversity of Florida, Gainesville, FL 32611, USAR. BassiriStanford University, Stanford, CA 94305, USAA. BastiINFN, Sezione di Pisa, I-56127 Pisa, ItalyM. BawajINFN, Sezione di Perugia, I-06123 Perugia, ItalyJ. C. BayleySUPA, University of Glasgow, Glasgow G12 8QQ, UKA. C. BaylorDepartment of Physics and Astronomy, Dickinson College, Carlisle, PA 17013, USAM. BazzanINFN, Sezione di Padova, I-35131 Padova, ItalyB. BécsyMontana State University, Bozeman, MT 59717, USAM. BejgerPolish Academy of SciencesI. BelahceneInstitut National de Physique Nucléaire et de Physique des ParticulesA. S. BellSUPA, University of Glasgow, Glasgow G12 8QQ, UKD. BeniwalThe University of AdelaideM. G. BenjaminEmbry-Riddle Aeronautical University, Prescott, AZ 86301, USAB. K. BergerStanford University, Stanford, CA 94305, USAG. BergmannLeibniz Universität Hannover, D-30167 Hannover, GermanySebastiano BernuzziTheoretisch-Physikalisches Institut, Friedrich-Schiller-Universität Jena, D-07743 Jena, GermanyC. P. L. BerryCenter for Interdisciplinary Exploration & Research in Astrophysics (CIERA), Northwestern University, Evanston, IL 60208, USAD. BersanettiINFN, Sezione di Genova, I-16146 Genova, ItalyA. BertoliniNikhef, Science Park 105, 1098 XG Amsterdam, The NetherlandsJ. BetzwieserLIGO Livingston Observatory, Livingston, LA 70754, USAR. BhandareRRCAT, Indore, Madhya Pradesh 452013, IndiaJ. BidlerCalifornia State University Fullerton, Fullerton, CA 92831, USAE. BiggsUniversity of Wisconsin-Milwaukee, Milwaukee, WI 53201, USAI. A. BilenkoFaculty of Physics, Lomonosov Moscow State University, Moscow 119991, RussiaS. A. BilgiliWest Virginia University, Morgantown, WV 26506, USAG. BillingsleyLIGO, California Institute of Technology, Pasadena, CA 91125, USAR. BirneySUPA, University of Strathclyde, Glasgow G1 1XQ, UKO. BirnholtzRochester Institute of Technology, Rochester, NY 14623, USAS. BiscansLIGO, California Institute of Technology, Pasadena, CA 91125, USA
2020en
ABI
Annotatsiya
Abstract On 2019 April 25, the LIGO Livingston detector observed a compact binary coalescence with signal-to-noise ratio 12.9. The Virgo detector was also taking data that did not contribute to detection due to a low signal-to-noise ratio, but were used for subsequent parameter estimation. The 90% credible intervals for the component masses range from to ( – if we restrict the dimensionless component spin magnitudes to be smaller than 0.05). These mass parameters are consistent with the individual binary components being neutron stars. However, both the source-frame chirp mass and the total mass of this system are significantly larger than those of any other known binary neutron star (BNS) system. The possibility that one or both binary components of the system are black holes cannot be ruled out from gravitational-wave data. We discuss possible origins of the system based on its inconsistency with the known Galactic BNS population. Under the assumption that the signal was produced by a BNS coalescence, the local rate of neutron star mergers is updated to 250–2810 .
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