Constraints on Skyrme equations of state from doubly magic nuclei, ab initio calculations of low-density neutron matter, and neutron stars

Tsang, C. Y.; Brown, B. A.; Fattoyev, F. J.; Lynch, W. G.; Tsang, M. B.

doi:10.1103/physrevc.100.062801

Title: Constraints on Skyrme equations of state from doubly magic nuclei, ab initio calculations of low-density neutron matter, and neutron stars

Journal Article · 22 December 2019 · Physical Review. C

DOI: https://doi.org/10.1103/physrevc.100.062801 · OSTI ID:1801141

Tsang, C. Y. ^[1]; Brown, B. A. ^[2]; Fattoyev, F. J. ^[3]; Lynch, W. G. ^[2]; Tsang, M. B. ^[2]

Michigan State Univ., East Lansing, MI (United States); OSTI
Michigan State Univ., East Lansing, MI (United States)
Manhattan College, Riverdale, NY (United States)

In this work, we use properties of doubly magic nuclei, ab initio calculations of low-density neutron matter and of neutron stars to constrain the parameters of the Skyrme energy-density functional. We find all of these properties can be reproduced within a constrained family of Skyrme parameters. The maximum mass of a neutron star is found to be sensitive to the neutron effective mass. A value of $$[m^\ast_n/m](ρ_0)$$ = 0.60 – 0.65 is required to obtain a maximum neutron-star mass of 2.0 to 2.1 solar masses. Using the constrained Skyrme functional with the aforementioned effective mass, the predicted radius for a neutron star of 1.4 solar masses is 12.4(1) km and tidal polarizability is Λ = 423(40).

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Research Organization:: Michigan State Univ., East Lansing, MI (United States)

Sponsoring Organization:: National Science Foundation (NSF); USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: NA0002923; SC0014530

OSTI ID:: 1801141

Journal Information:: Physical Review. C, Journal Name: Physical Review. C Journal Issue: 6 Vol. 100; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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