Charged charm stars

TL;DR

This paper investigates the properties and stability of charged charm stars within the MIT bag model, showing that electric charge increases stellar mass but does not eliminate radial oscillation instability.

Contribution

It introduces two models for electric charge distribution in charm stars and analyzes their effects on stability and mass within the MIT bag framework.

Findings

Charged charm stars have larger masses than neutral ones.

Electric charge modifies eigenfrequencies of radial oscillations.

Instability persists in charged charm stars despite charge effects.

Abstract

The study of the general properties and stability of charm stars with a net electric charge is performed within the MIT bag model framework. We consider two different models for the electric charge distribution and demostrate that both imply stellar configurations with larger masses and that satisfy the equilibrium condition. The dynamical stability against radial oscillations is investigated. Our results demonstrate that the eigenfrequencies are modified by the presence of a net electric charge, but the instability, previously demonstrated for the electrically neutral case, is also present in charged charm stars.