Deconfinement to Quark Matter in Neutron Stars - The Influence of Strong Magnetic Fields

TL;DR

This paper investigates how strong magnetic fields affect the composition and properties of hybrid neutron stars using an extended sigma model that includes quarks and considers different charge neutrality conditions.

Contribution

It introduces an extended hadronic-quark model for hybrid stars and analyzes the effects of magnetic fields and charge neutrality prescriptions on their particle populations.

Findings

Magnetic fields significantly influence particle populations in hybrid stars.

Charge neutrality assumptions alter the star's internal composition.

The model naturally transitions from hadronic to quark matter with increasing density.

Abstract

We use an extended version of the hadronic SU(3) non-linear realization of the sigma model that also includes quarks to study hybrid stars. Within this approach, the degrees of freedom change naturally as the temperature/density increases. Different prescriptions of charge neutrality, local and global, are tested and the influence of strong magnetic fields and the anomalous magnetic moment on the particle population is discussed.