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. AcerneseINFN, Sezione di Napoli, Complesso Universitario di Monte S.Angelo, I-80126 Napoli, ItalyK. AckleyOzGrav, School of Physics & Astronomy, Monash University, Clayton 3800, Victoria, AustraliaC. AdamsLIGO Livingston Observatory, Livingston, LA 70754, USAR. X. AdhikariLIGO, California Institute of Technology, Pasadena, CA 91125, USAV. B. AdyaOzGrav, Australian National University, Canberra, Australian Capital Territory 0200, AustraliaC. AffeldtLeibniz Universität Hannover, 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 Sciences, Tata Institute of Fundamental Research, Bengaluru 560089, IndiaB. 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 Avancés (LMA), CNRS/IN2P3, F-69622 Villeurbanne, FranceShreya 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. AntierAPC, AstroParticule et Cosmologie, Université Paris Diderot, CNRS/IN2P3, CEA/Irfu, Observatoire de Paris, Sorbonne Paris Cité, F-75205 Paris Cedex 13, FranceS. 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. ArèneAPC, AstroParticule et Cosmologie, Université Paris Diderot, CNRS/IN2P3, CEA/Irfu, Observatoire de Paris, Sorbonne Paris Cité, F-75205 Paris Cedex 13, FranceN. ArnaudUniversité Paris-SaclayS. M. AronsonUniversity of Florida, Gainesville, FL 32611, USAK. G. ArunChennai Mathematical Institute, Chennai 603103, IndiaS. AscenziINFN, Sezione di Roma Tor Vergata, I-00133 Roma, ItalyG. AshtonOzGrav, School of Physics & Astronomy, Monash University, Clayton 3800, Victoria, AustraliaS. M. AstonLIGO Livingston Observatory, Livingston, LA 70754, USAP. AstoneINFN, Sezione di Roma, I-00185 Roma, ItalyF. AubinLaboratoire d'Annecy de Physique des Particules (LAPP), Univ. Grenoble Alpes, Université Savoie Mont Blanc, CNRS/IN2P3, F-74941 Annecy, FranceP. 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. BaconAPC, AstroParticule et Cosmologie, Université Paris Diderot, CNRS/IN2P3, CEA/Irfu, Observatoire de Paris, Sorbonne Paris Cité, F-75205 Paris Cedex 13, FranceF. 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. BairdAPC, AstroParticule et Cosmologie, Université Paris Diderot, CNRS/IN2P3, CEA/Irfu, Observatoire de Paris, Sorbonne Paris Cité, F-75205 Paris Cedex 13, FranceP. T. BakerWest Virginia University, Morgantown, WV 26506, USAF. BaldacciniUniversità 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. BarbieriUniversità degli Studi 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. BarsugliaAPC, AstroParticule et Cosmologie, Université Paris Diderot, CNRS/IN2P3, CEA/Irfu, Observatoire de Paris, Sorbonne Paris Cité, F-75205 Paris Cedex 13, FranceD. 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. BawajUniversità di Camerino, Dipartimento di Fisica, I-62032 Camerino, 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. BejgerAPC, AstroParticule et Cosmologie, Université Paris Diderot, CNRS/IN2P3, CEA/Irfu, Observatoire de Paris, Sorbonne Paris Cité, F-75205 Paris Cedex 13, FranceI. BelahceneLAL, Univ. Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, F-91898 Orsay, FranceA. S. BellSUPA, University of Glasgow, Glasgow G12 8QQ, UKD. BeniwalOzGrav, University of Adelaide, Adelaide, South Australia 5005, AustraliaM. 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, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
2020en
ABI
Аннотация
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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