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 demonstrate 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.

中文翻译：

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带电魅力之星

在MIT袋模型框架内对带有净电荷的魅力恒星的一般性质和稳定性进行了研究。我们考虑了两种不同的电荷分布模型，并证明它们都暗示着质量较大的恒星构型并且满足平衡条件。研究了抵抗径向振动的动力学稳定性。我们的结果表明，存在净电荷会改变本征频率，但以前在电中性情况下表现出的不稳定性也存在于带电的魅力星中。