Neutron Star Tidal Deformabilities Constrained by Nuclear Theory and Experiment

Yeunhwan Lim and Jeremy W. Holt
Phys. Rev. Lett. 121, 062701 – Published 7 August 2018

Abstract

We confront observational data from gravitational wave event GW170817 with microscopic modeling of the cold neutron star equation of state. We develop and employ a Bayesian statistical framework that enables us to implement constraints on the equation of state from laboratory measurements of nuclei and state-of-the-art chiral effective field theory methods. The energy density functionals constructed from the posterior probability distributions are then used to compute consistently the neutron star equation of state from the outer crust to the inner core, assuming a composition consisting of protons, neutrons, electrons, and muons. In contrast to previous studies, we find that the 95% credibility range of predicted neutron star tidal deformabilities (136<Λ<519) for a 1.4 solar-mass neutron star is already consistent with the upper bound deduced from observations of the GW170817 event. However, we find that lower bounds on the neutron star tidal deformability will very strongly constrain microscopic models of the dense matter equation of state. We also demonstrate a strong correlation between the neutron star tidal deformability and the pressure of beta-equilibrated matter at twice saturation density.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Received 10 April 2018
  • Revised 8 June 2018

DOI:https://doi.org/10.1103/PhysRevLett.121.062701

© 2018 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

Yeunhwan Lim1,* and Jeremy W. Holt1,2,†

  • 1Cyclotron Institute, Texas A&M University, College Station, Texas 77843, USA
  • 2Department of Physics and Astronomy, Texas A&M University, College Station, Texas 77843, USA

  • *ylim@tamu.edu
  • holt@physics.tamu.edu

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 121, Iss. 6 — 10 August 2018

Reuse & Permissions
Access Options
CHORUS

Article Available via CHORUS

Download Accepted Manuscript
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×