On attributes of a Rotating Neutron star with a Hyperon core

TL;DR

This paper investigates how rotation affects the properties of neutron stars with hyperon cores using an effective chiral model, comparing predictions with observations and experimental data.

Contribution

It introduces a model that accounts for rotation and hyperon cores, analyzing its predictions against observations and other theories.

Findings

Maximum mass range of (1.4-2.4) solar masses at Kepler frequency.

Sensitivity of neutron star properties to nucleon effective mass.

Consistency with recent high-mass neutron star observations.

Abstract

We study the effect of rotation on global properties of neutron star with a hyperon core in an effective chiral model with varying nucleon effective mass within a mean field approach. The resulting gross properties of the rotating compact star sequences are then compared and analyzed with other theoretical predictions and observations from neutron stars. The maximum mass of the compact star predicted by the model lies in the range $(1.4-2.4) ~M_{\odot}$ at Kepler frequency $\Omega_K$, which is consistant with recent observation of high mass stars thereby reflecting the sensitivity of the underlying nucleon effective mass in the dense matter EoS. We also discuss the implications of the experimental constraints from the flow data from heavy-ion collisions on the global properties of the rotating neutron stars.