Equation of State Constraints from Nuclear Physics, Neutron Star Masses, and Future Moment of Inertia Measurements

Greif, S. K.; Hebeler, K.; Lattimer, J. M.; Pethick, C. J.; Schwenk, A.

doi:10.3847/1538-4357/abaf55

Title: Equation of State Constraints from Nuclear Physics, Neutron Star Masses, and Future Moment of Inertia Measurements

Journal Article · Mon Oct 05 00:00:00 EDT 2020 · The Astrophysical Journal

DOI:https://doi.org/10.3847/1538-4357/abaf55· OSTI ID:1864781

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Technische Univ. Darmstadt (Germany);GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt (Germany)
Stony Brook Univ., NY (United States)
Univ. of Copenhagen (Denmark); KTH Royal Inst. of Technology and Stockholm Univ. (Sweden)
Technische Univ. Darmstadt (Germany);GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt (Germany); Max-Planck-Institut für Kernphysik, Heidelberg (Germany)

We explore constraints on the equation of state (EOS) of neutron-rich matter based on microscopic calculations up to nuclear densities and observations of neutron stars. In a previous work we showed that predictions based on modern nuclear interactions derived within chiral effective field theory and the observation of two-solar-mass neutron stars result in a robust uncertainty range for neutron star radii and the EOS over a wide range of densities. In this work we extend this study, employing both the piecewise polytrope extension from Hebeler et al. as well as the speed of sound model of Greif et al., and show that moment of inertia measurements of neutron stars can significantly improve the constraints on the EOS and neutron star radii.

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Research Organization:: Research Foundation of New York, NY (United States); State Univ. of New York (SUNY), Albany, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: FG02-87ER40317

OSTI ID:: 1864781

Alternate ID(s):: OSTI ID: 1849952

Journal Information:: The Astrophysical Journal, Vol. 901, Issue 2; ISSN 0004-637X

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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A new consistent Neutron Star Equation of State from a Generalized Skyrme model Adam, Christoph; Martín-Caro, Alberto García; García, Miguel Huidobro arXiv https://doi.org/10.48550/arxiv.2006.07983	text	January 2020
New equations of state constrained by nuclear physics, observations, and QCD calculations of high-density nuclear matter Huth, S.; Wellenhofer, C.; Schwenk, A. arXiv https://doi.org/10.48550/arxiv.2009.08885	text	January 2020
Quasi-universal relations for generalized Skyrme stars Adam, Christoph; Martín-Caro, Alberto García; Huidobro, Miguel arXiv https://doi.org/10.48550/arxiv.2011.08573	text	January 2020
Topology change, emergent symmetries and compact star matter Ma, Yong-Liang; Rho, Mannque arXiv https://doi.org/10.48550/arxiv.2103.00744	text	January 2021
A multifluid perspective on multimessenger modelling Andersson, N. arXiv https://doi.org/10.48550/arxiv.2103.10220	preprint	January 2021

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