English

Consistent Skyrme parametrizations constrained by GW170817

Nuclear Theory 2020-02-07 v2

Abstract

The high-density behavior of the stellar matter composed of nucleons and leptons under β\beta~equilibrium and charge neutrality conditions is studied with the Skyrme parametrizations shown to be consistent (CSkP) with the nuclear matter, pure neutron matter, symmetry energy and its derivatives in a set of 1111 constraints [Dutra {\it et al.}, Phys. Rev. C 85, 035201 (2012)]. The predictions of these parametrizations on the tidal deformabilities related to the GW170817 event are also examined. The CSkP that produce massive neutron stars give a range of 11.86 \mboxkmR1.412.55 \mboxkm11.86~\mbox{km} \leqslant R_{1.4} \leqslant 12.55~\mbox{km} for the canonical star radius, in agreement with other theoretical predictions. It is shown that the CSkP are compatible with the region of masses and radii obtained from the analysis of recent data from LIGO and Virgo Collaboration (LVC). A correlation between dimensionless tidal deformability and radius of the canonical star is found, namely, Λ1.43.16×106R1.47.35\Lambda_{1.4} \approx 3.16\times10^{-6}R_{1.4}^{7.35}, with results for the CSkP compatible with the recent range of Λ1.4=190120+390\Lambda_{1.4}=190_{-120}^{+390} from LVC. An analysis of the Λ1×Λ2\Lambda_1\times\Lambda_2 graph shows that all the CSkP are compatible with the recent bounds obtained by LVC. Finally, the universal correlation between the moment of inertia and the deformability of a neutron star, named as the \mbox{II-Love} relation, is verified for the CSkP, that are also shown to be consistent with the prediction for the moment of inertia of the \mbox{PSR J0737-3039} primary component pulsar.

Keywords

Cite

@article{arxiv.1901.04529,
  title  = {Consistent Skyrme parametrizations constrained by GW170817},
  author = {O. Lourenço and M. Dutra and C. H. Lenzi and S. K. Biswal and M. Bhuyan and D. P. Menezes},
  journal= {arXiv preprint arXiv:1901.04529},
  year   = {2020}
}

Comments

10 pages, 7 figures

R2 v1 2026-06-23T07:11:37.082Z