Gravitational-Wave Constraints on the Neutron-Star-Matter Equation of State

Physical Review Letters
Eemeli AnnalaAleksi Vuorinen

Abstract

The detection of gravitational waves originating from a neutron-star merger, GW170817, by the LIGO and Virgo Collaborations has recently provided new stringent limits on the tidal deformabilities of the stars involved in the collision. Combining this measurement with the existence of two-solar-mass stars, we generate a generic family of neutron-star-matter equations of state (EOSs) that interpolate between state-of-the-art theoretical results at low and high baryon density. Comparing the results to ones obtained without the tidal-deformability constraint, we witness a dramatic reduction in the family of allowed EOSs. Based on our analysis, we conclude that the maximal radius of a 1.4-solar-mass neutron star is 13.6 km, and that the smallest allowed tidal deformability of a similar-mass star is Λ(1.4  M_{⊙})=120.

References

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Citations

Jul 14, 2018·Physical Review Letters·Elias R MostJürgen Schaffner-Bielich
Dec 1, 2018·Physical Review Letters·Tyler GordaAleksi Vuorinen
Sep 25, 2019·Reports on Progress in Physics·Teruaki EnotoShinpei Shibata
Mar 2, 2019·Physical Review Letters·Elias R MostLuciano Rezzolla
Oct 2, 2019·Physical Review Letters·S AcharyaUNKNOWN A Large Ion Collider Experiment Collaboration
Nov 6, 2018·Physical Review Letters·B P AbbottUNKNOWN LIGO Scientific Collaboration and the Virgo Collaboration
Aug 25, 2018·Physical Review Letters·Yeunhwan Lim, Jeremy W Holt
Apr 13, 2019·Physical Review Letters·Larry McLerran, Sanjay Reddy
May 16, 2020·Physical Review Letters·Lukas R WeihLuciano Rezzolla
Jan 8, 2021·Physical Review Letters·Carlos HoyosAleksi Vuorinen
Jan 16, 2021·Physical Review Letters·Hung TanNico Yunes
Feb 27, 2021·Physical Review Letters·Mohammad Al-MamunSophia Han

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