电荷如何影响引力星的形成
How the Charge Can Affect the Formation of Gravastars
摘要：
在最近的工作中，我们物理解释了一个特殊的引力星解决方案，其特点是零史瓦西质量。事实上，在这种情况下，没有引力星形成，壳层膨胀，留下了德西特或闵可夫斯基时空，或者坍缩而没有形成事件视界，产生了我们所说的大质量非引力物体。这个物体有两个非零质量的分量，但外部时空是闵可夫斯基或德西特。其中一个组成部分是一个巨大的薄壳，另一个组成部分是德西特时空。这个物体的总质量是零史瓦西质量，这是外部真空时空的特征。在这里，我们将这项研究扩展到带电壳层的情况。现在，外部是一个Reissner-Nordström时空，取决于壳层状态方程的参数$ω=1-γ$和电荷，可以形成引力星结构。我们已经发现，电荷的存在有助于重力星的稳定性，如果电荷是大于一个临界值。否则，一个大质量的非引力物体就会形成小电荷。
英文摘要：
In recent work we physically interpreted a special gravastar solution characterized by a zero Schwarzschild mass. In fact, in that case, none gravastar was formed and the shell expanded, leaving behind a de Sitter or a Minkowski spacetime, or collapsed without forming an event horizon, originating what we called a massive non-gravitational object. This object has two components of non zero mass but the exterior spacetime is Minkowski or de Sitter. One of the component is a massive thin shell and the other one is de Sitter spacetime inside. The total mass of this object is zero Schwarzschild mass, which characterizes an exterior vacuum spacetime. Here, we extend this study to the case where we have a charged shell. Now, the exterior is a Reissner-Nordström spacetime and, depending on the parameter $ω=1-γ$ of the equation of state of the shell, and the charge, a gravastar structure can be formed. We have found that the presence of the charge contributes to the stability of the gravastar, if the charge is greater than a critical value. Otherwise, a massive non-gravitational object is formed for small charges.
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