Background: In our earlier work [Phys. Rev. C 104, 055804 (2021)], we studied the surface properties of a neutron star, assuming it as a huge finite nucleus containing protons, neutrons, electrons, and muons. For the first time, we reported these results of a neutron star for a few representative masses.

Purpose: The purpose of the present work is to calculate the domain of numerical values for the surface properties of neutron stars based on the theoretical analogy of finite nuclei. In the present paper, we systematically calculate incompressibility, symmetry energy, slope parameter, etc. for a certain range of neutron star's mass to draw some definite conclusions.

Method: To carry forward our earlier idea, the energy density functional of the momentum space of neutron star matter is converted to the coordinate space in a local density approximation. This functional is again used to derive the neutron star surface properties within the coherent density fluctuation model using the weight function obtained from the density profile of the neutron star using the recently developed G3 and widely used NL3 and IU-FSU parameter sets in the context of relativistic mean-field formalism.

Results: The systematic surface properties of the neutron star, such as incompressibility, symmetry energy, slope parameter, and curvature coefficient is calculated. The volume and surface components of the total symmetry energy are decomposed with the help of the $\kappa$ factor obtained from the volume to surface ratio of the symmetry energies in the liquid drop limit of Danielewicz. The magnitude of the computed surface quantities increases with the neutron star's mass.

Conclusion: The incompressibility $K^{\mathrm{star}}$, symmetry energy $S^{\mathrm{star}}$, slope parameter $L_{\mathrm{sym}}^{\mathrm{star}}$, and curvature coefficient $K_{\mathrm{sym}}^{\mathrm{star}}$ of the neutron stars with different mass are analyzed and found to be model dependent. NL3 is the stiffest equation of state and endues us with the higher magnitude of surface quantities as compared to the G3 and IU-FSU forces.

• Received 5 January 2022
• Accepted 30 March 2022

DOI:https://doi.org/10.1103/PhysRevC.105.045804