Approximate universal relations among tidal parameters for neutron star binaries

dc.contributor.authorYagi, Kent
dc.contributor.authorYunes, Nicolás
dc.description.abstractOne of the largest uncertainties in nuclear physics is the relation between the pressure and density of supranuclear matter: the equation of state. Some of this uncertainty may be removed through future gravitational wave observations of neutron star binaries by extracting the tidal deformabilities (or Love numbers) of neutron stars, a novel way to probe nuclear physics in the high-density regime. Previous studies have shown that only a certain combination of the individual (quadrupolar) deformabilities of each body (the so-called chirp tidal deformability) can be measured with second-generation, gravitational wave interferometers, such as Adv. LIGO, due to correlations between the individual deformabilities. To overcome this, we search for approximately universal (i.e. approximately equation-of-state independent) relations between two combinations of the individual tidal deformabilities, such that once one of them as been measured, the other can be automatically obtained and the individual ones decoupled through these relations. We find an approximately universal relation between the symmetric and the anti-symmetric combination of the individual tidal deformabilities, that is equation-of-state-insensitive to 20% for binaries with masses less than 1.7M(circle dot). We show that these relations can be used to eliminate a combination of the tidal parameters from the list of model parameters, thus breaking degeneracies and improving the accuracy in parameter estimation. A simple (Fisher) study shows that the universal binary Love relations can improve the accuracy in the extraction of the symmetric combination of tidal parameters by as much as an order of magnitude, making the overall accuracy in the extraction of this parameter slightly better than that of the chirp tidal deformability. These new universal relations and the improved measurement accuracy on tidal parameters not only are important to astrophysics and nuclear physics, but also impact our ability to probe extreme gravity with gravitational waves and cosmology.en_US
dc.description.sponsorshipJSPS; NSF (PHY-1305682, PHY-1250636)en_US
dc.identifier.citationYagi, Kent, and Nicolas Yunes. "Approximate universal relations among tidal parameters for neutron star binaries." Classical and Quantum Gravity 34, no. 1 (January 2017).
dc.titleApproximate universal relations among tidal parameters for neutron star binariesen_US
mus.citation.journaltitleClassical and Quantum Gravityen_US
mus.identifier.categoryPhysics & Mathematicsen_US
mus.relation.collegeCollege of Letters & Scienceen_US
mus.relation.universityMontana State University - Bozemanen_US


Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
21.44 MB
Adobe Portable Document Format
Approximate universal relations among tidal parameters for neutron star binaries (PDF)
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
826 B
Item-specific license agreed upon to submission
Copyright (c) 2002-2022, LYRASIS. All rights reserved.