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dc.contributor.authorRaithel, Carolyn A.
dc.contributor.authorÖzel, Feryal
dc.contributor.authorPsaltis, Dimitrios
dc.date.accessioned2018-05-23T15:51:51Z
dc.date.available2018-05-23T15:51:51Z
dc.date.issued2018-04-20
dc.identifier.citationCarolyn A. Raithel et al 2018 ApJL 857 L23en_US
dc.identifier.issn2041-8213
dc.identifier.doi10.3847/2041-8213/aabcbf
dc.identifier.urihttp://hdl.handle.net/10150/627756
dc.description.abstractGravitational waves from the coalescence of two neutron stars were recently detected for the first time by the LIGO-Virgo Collaboration, in event GW170817. This detection placed an upper limit on the effective tidal deformability of the two neutron stars and tightly constrained the chirp mass of the system. We report here on a new simplification that arises in the effective tidal deformability of the binary, when the chirp mass is specified. We find that, in this case, the effective tidal deformability of the binary is surprisingly independent of the component masses of the individual neutron stars, and instead depends primarily on the ratio of the chirp mass to the neutron star radius. Thus, a measurement of the effective tidal deformability can be used to directly measure the neutron star radius. We find that the upper limit on the effective tidal deformability from GW170817 implies that the radius cannot be larger than similar to 13. km, at the 90% level, independent of the assumed masses for the component stars. The result can be applied generally, to probe the stellar radii in any neutron star-neutron star merger with a measured chirp mass. The approximate mass independence disappears for neutron star- black hole mergers. Finally, we discuss a Bayesian inference of the equation of state that uses the measured chirp mass and tidal deformability from GW170817 combined with nuclear and astrophysical priors and discuss possible statistical biases in this inference.en_US
dc.description.sponsorshipNSF Graduate Research Fellowship Program [DGE-1143953]; NASA grant [NNX16AC56G]en_US
dc.language.isoenen_US
dc.publisherIOP PUBLISHING LTDen_US
dc.relation.urlhttp://stacks.iop.org/2041-8205/857/i=2/a=L23?key=crossref.4aaafd6a8d6191e2ff0921c2c869a47aen_US
dc.rights© 2018. The American Astronomical Society. All rights reserved.en_US
dc.subjectequation of stateen_US
dc.subjectgravitational wavesen_US
dc.subjectstars: neutronen_US
dc.titleTidal Deformability from GW170817 as a Direct Probe of the Neutron Star Radiusen_US
dc.typeArticleen_US
dc.contributor.departmentUniv Arizona, Steward Observ, Dept Astronen_US
dc.identifier.journalASTROPHYSICAL JOURNAL LETTERSen_US
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en_US
dc.eprint.versionFinal published versionen_US
dc.source.journaltitleThe Astrophysical Journal
dc.source.volume857
dc.source.issue2
dc.source.beginpageL23
refterms.dateFOA2018-05-23T15:51:51Z


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