Consistent Skyrme parametrizations constrained by GW170817
Document Type
Article
Publication Date
2-1-2020
Abstract
The high-density behavior of stellar matter composed of nucleons and leptons under beta equilibrium and charge neutrality conditions is studied with the Skyrme parametrizations shown to be consistent (Consistent Skyrme Parametrizations, CSkP) with nuclear matter, pure neutron matter, symmetry energy and its derivatives in a set of 11 constraints Dutra 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 11.86km <= R1.4 <= 12.55km 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, ?1.4 approximate to 3.16x10-6R1.47.35, with results for the CSkP compatible with the recent range of ?1.4=190-120+390 from LVC. An analysis of the ?1x?2_2$$\textbackslashend{document} 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 the I-Love relation, is verified for the CSkP; it is also shown to be consistent with the prediction for the moment of inertia of the PSR J0737-3039 primary component pulsar.
Keywords
Neutron Stars, Equations of State, Nuclear Matter
Divisions
PHYSICS
Funders
Fundação de Amparo à Pesquisa do Estado de São Paulo,Conselho Nacional de Desenvolvimento Científico e Tecnológico,National Key Research and Development Program of China
Publication Title
European Physical Journal A
Volume
56
Issue
2
Publisher
Springer
Publisher Location
ONE NEW YORK PLAZA, SUITE 4600, NEW YORK, NY, UNITED STATES