QHD equation of state for strongly magnetized neutron stars

TL;DR

This paper explores how strong magnetic fields influence the quantum hadrodynamic equation of state for neutron stars, affecting their mass, radius, and internal dynamics, with implications for understanding magnetar phenomena.

Contribution

It introduces a detailed model of the QHD equation of state for magnetized neutron stars, including hyperons, aligning theoretical predictions with recent high-mass neutron star observations.

Findings

Masses and radii are consistent with observations under strong magnetic fields.

Adiabatic index and moments of inertia show rapid density-dependent changes.

Potential insights into star-quakes and flares in magnetars.

Abstract

We investigate the quantum hadrodynamic equation of state for neutron stars (with and without including hyperons) in the presence of strong magnetic fields. The deduced masses and radii are consistent with recent observations of high mass neutron stars even in the case of hyperonic nuclei for sufficiently strong magnetic fields. The calculated adiabatic index and the moments of inertia for magnetized neutron stars exhibit rapid changes with density. This may provide some insight into the mechanism of star-quakes and flares in magnetars.