Properties of the Binary Neutron Star Merger GW170817
- Creators
- Abbott, B. P.
- Abbott, R.
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Adhikari, R. X.
- Ananyeva, A.
- Anderson, S. B.
- Appert, S.
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Arai, K.
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Araya, M. C.
- Barayoga, J. C.
- Barish, B. C.
- Berger, B. K.
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Billingsley, G.
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Biscans, S.
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Blackburn, J. K.
- Bork, R.
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Brooks, A. F.
- Brunett, S.
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Cahillane, C.
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Callister, T. A.
- Cepeda, C. B.
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Coughlin, M. W.
- Couvares, P.
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Coyne, D. C.
- Ehrens, P.
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Eichholz, J.
- Etzel, T.
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Feicht, J.
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Gossan, S. E.
- Gushwa, K. E.
- Gustafson, E. K.
- Heptonstall, A. W.
- Hulko, M.
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Isi, M.
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Barkett, K.
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Blackman, J.
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Chen, Y.
- Chua, A. J. K.
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Kamai, B.
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Kanner, J. B.
- Kondrashov, V.
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Korth, W. Z.
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Kozak, D. B.
- Lazzarini, A.
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Markowitz, A.
- Maros, E.
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Massinger, T. J.
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Matichard, F.
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McIver, J.
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Meshkov, S.
- Nevin, L.
- Pedraza, M.
- Quintero, E. A.
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Reitze, D. H.
- Robertson, N. A.
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Rollins, J. G.
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Sachdev, S.
- Sanchez, E. J.
- Sanchez, L. E.
- Taylor, R.
- Torrie, C. I.
- Urban, A. L.
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Vajente, G.
- Vass, S.
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Venugopalan, G.
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Wade, A. R.
- Wallace, L.
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Weinstein, A. J.
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Williams, R. D.
- Willis, J. L.
- Wipf, C. C.
- Xiao, S.
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Yamamoto, H.
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Zhang, L.
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Zucker, M. E.
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Zweizig, J.
- Li, X.
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Ma, Y.
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Pang, B.
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Scheel, M.
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Tso, R.
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Varma, V.
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Chatziioannou, K.
- LIGO Scientific Collaboration
- Virgo Collaboration
Abstract
On August 17, 2017, the Advanced LIGO and Advanced Virgo gravitational-wave detectors observed a low-mass compact binary inspiral. The initial sky localization of the source of the gravitational-wave signal, GW170817, allowed electromagnetic observatories to identify NGC 4993 as the host galaxy. In this work, we improve initial estimates of the binary's properties, including component masses, spins, and tidal parameters, using the known source location, improved modeling, and recalibrated Virgo data. We extend the range of gravitational-wave frequencies considered down to 23 Hz, compared to 30 Hz in the initial analysis. We also compare results inferred using several signal models, which are more accurate and incorporate additional physical effects as compared to the initial analysis. We improve the localization of the gravitational-wave source to a 90% credible region of 16  deg^2. We find tighter constraints on the masses, spins, and tidal parameters, and continue to find no evidence for nonzero component spins. The component masses are inferred to lie between 1.00 and 1.89  M⊙ when allowing for large component spins, and to lie between 1.16 and 1.60  M⊙ (with a total mass 2.73^(+0.04)_(−0.01)  M⊙) when the spins are restricted to be within the range observed in Galactic binary neutron stars. Using a precessing model and allowing for large component spins, we constrain the dimensionless spins of the components to be less than 0.50 for the primary and 0.61 for the secondary. Under minimal assumptions about the nature of the compact objects, our constraints for the tidal deformability parameter ˜Λ are (0,630) when we allow for large component spins, and 300^(+420)_(−230_ (using a 90% highest posterior density interval) when restricting the magnitude of the component spins, ruling out several equation-of-state models at the 90% credible level. Finally, with LIGO and GEO600 data, we use a Bayesian analysis to place upper limits on the amplitude and spectral energy density of a possible postmerger signal.
Additional Information
© 2019 Published by the American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Received 6 June 2018; revised manuscript received 20 September 2018; published 2 January 2019. The authors gratefully acknowledge the support of the United States National Science Foundation (NSF) for the construction and operation of the LIGO Laboratory and Advanced LIGO, as well as the Science and Technology Facilities Council (STFC) of the United Kingdom, the Max-Planck-Society (MPS), and the State of Niedersachsen/Germany for support of the construction of Advanced LIGO and construction and operation of the GEO600 detector. Additional support for Advanced LIGO was provided by the Australian Research Council. The authors gratefully acknowledge the Italian Istituto Nazionale di Fisica Nucleare (INFN), the French Centre National de la Recherche Scientifique (CNRS) and the Foundation for Fundamental Research on Matter supported by the Netherlands Organisation for Scientific Research, for the construction and operation of the Virgo detector and the creation and support of the EGO consortium. The authors also gratefully acknowledge research support from these agencies as well as by the Council of Scientific and Industrial Research of India; the Department of Science and Technology, India; the Science & Engineering Research Board (SERB), India; the Ministry of Human Resource Development, India; the Spanish Agencia Estatal de Investigación; the Vicepresidència i Conselleria d'Innovació; Recerca i Turisme and the Conselleria d'Educació i Universitat del Govern de les Illes Balears; the Conselleria d'Educació, Investigació, Cultura i Esport de la Generalitat Valenciana; the National Science Centre of Poland; the Swiss National Science Foundation (SNSF); the Russian Foundation for Basic Research; the Russian Science Foundation; the European Commission; the European Regional Development Funds (ERDF); the Royal Society; the Scottish Funding Council; the Scottish Universities Physics Alliance; the Hungarian Scientific Research Fund (OTKA); the Lyon Institute of Origins (LIO); the Paris Île-de-France Region; the National Research, Development and Innovation Office Hungary (NKFI); the National Research Foundation of Korea; Industry Canada and the Province of Ontario through the Ministry of Economic Development and Innovation; the Natural Science and Engineering Research Council Canada; the Canadian Institute for Advanced Research; the Brazilian Ministry of Science, Technology, Innovations, and Communications; the International Center for Theoretical Physics South American Institute for Fundamental Research (ICTP-SAIFR); the Research Grants Council of Hong Kong; the National Natural Science Foundation of China (NSFC); the Leverhulme Trust; the Research Corporation; the Ministry of Science and Technology (MOST), Taiwan; and the Kavli Foundation. The authors gratefully acknowledge the support of the NSF, STFC, Max-Planck-Society (MPS), INFN, CNRS, and the State of Niedersachsen/Germany for provision of computational resources. The GW strain data for this event are available at the LIGO Open Science Center [167]. This article has been assigned the document number LIGO-P1800061.Attached Files
Published - PhysRevX.9.011001.pdf
Submitted - 1805.11579.pdf
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Additional details
- Eprint ID
- 92118
- Resolver ID
- CaltechAUTHORS:20190107-131805656
- NSF
- Science and Technology Facilities Council (STFC)
- Max-Planck-Society (MPS)
- State of Niedersachsen/Germany
- Australian Research Council
- Istituto Nazionale di Fisica Nucleare (INFN)
- Centre National de la Recherche Scientifique (CNRS)
- Stichting voor Fundamenteel Onderzoek der Materie (FOM)
- Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO)
- Council of Scientific and Industrial Research (India)
- Department of Science and Technology (India)
- Science and Engineering Research Board (SERB)
- Ministry of Human Resource Development (India)
- Agencia Estatal de Investigación
- Vicepresidència i Conselleria d'Innovació, Recerca i Turisme
- Conselleria d'Educació i Universitat del Govern de les Illes Balears
- Conselleria d'Educació, Investigació, Cultura i Esport de la Generalitat Valenciana
- National Science Centre (Poland)
- Swiss National Science Foundation (SNSF)
- Russian Foundation for Basic Research
- Russian Science Foundation
- European Commission
- European Regional Development Fund
- Royal Society
- Scottish Funding Council
- Scottish Universities Physics Alliance
- Hungarian Scientific Research Fund (OTKA)
- Lyon Institute of Origins (LIO)
- Paris ÃŽle-de-France Region
- National Research, Development and Innovation Office (Hungary)
- National Research Foundation of Korea
- Industry Canada
- Province of Ontario Ministry of Economic Development and Innovation
- Natural Science and Engineering Research Council of Canada (NSERC)
- Canadian Institute for Advanced Research (CIFAR)
- Ministério da Ciência, Tecnologia, Inovações e Comunicações (MCTIC)
- International Center for Theoretical Physics South American Institute for Fundamental Research (ICTP-SAIFR)
- Research Grants Council of Hong Kong
- National Natural Science Foundation of China
- Leverhulme Trust
- Research Corporation
- Ministry of Science and Technology (Taipei)
- Kavli Foundation
- Created
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2019-01-07Created from EPrint's datestamp field
- Updated
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2023-04-28Created from EPrint's last_modified field
- Caltech groups
- LIGO, Astronomy Department
- Other Numbering System Name
- LIGO Document
- Other Numbering System Identifier
- LIGO-P1800061