Influence of the nuclear symmetry energy slope on observables of compact stars with $\Delta$-admixed hypernuclear matter

2021-12-23 2022-01-05

In this work, we study the effects of nuclear symmetry energy slope on neutron star dense matter equation of state and its impact on neutron star observables (mass-radius, tidal response). We construct the equation of state within the framework of covariant density functional theory implementing coupling schemes of non-linear and density-dependent models with viability of heavier non-nucleonic degrees of freedom. The slope of symmetry energy parameter ($L_{\text{sym}}$) is adjusted following density-dependence of isovector meson coupling to baryons. We find that smaller values of $L_{\text{sym}}$ at saturation favour early appearance of $\Delta$-resonances in comparison to hyperons leading to latter's threshold at higher matter densities. We also investigate the dependence of $L_{\text{sym}}$ on tidal deformability and compactness parameter of a $1.4~M_\odot$ neutron star for different equation of states and observe similar converging behaviour for larger $L_{\text{sym}}$ values.
Comment: 14 pages, 10 figures, 8 tables; corrected some typos; matches with published version

Astrophysics - High Energy Astrophysical Phenomena; Nuclear Theory; text

10.1103.PhysRevC.105.015802

Open access content. Open access content

COO oai:arXiv.org:2112.12629
Phys. Rev. C 105, 015802 (2022)
doi:10.1103/PhysRevC.105.015802
1312093299

CORNELL UNIV
From OAIster®, provided by the OCLC Cooperative.

edsoai.on1312093299