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arXiv 2102.09160gr-qc
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Newman-Penrose形式中的引力扰动:在虫洞中的应用

Gravitational perturbations in the Newman-Penrose formalism: Applications to wormholes

Juan Carlos Del Águila, Tonatiuh Matos

摘要:

在这项工作中,我们研究了静止和球对称虫洞中引力扰动的线性稳定性问题。为了这个目的,我们采用纽曼-彭罗斯形式主义,这是非常适合于处理引力辐射在广义相对论,以及这个理论的几何方面。用这种方法我们得到了描述Regge-Wheeler规范中奇宇称引力微扰行为的“主方程”。这个方程后来被应用到一类特定的莫里斯-索恩虫洞,也到度量的渐近平坦的标量场虫洞。这些时空产生的方程的分析表明,没有不稳定的振动模式所产生的类型的扰动在这里研究。

英文摘要:

In this work we study the problem of linear stability of gravitational perturbations in stationary and spherically symmetric wormholes. For this purpose, we employ the Newman-Penrose formalism which is well-suited for treating gravitational radiation in General Relativity, as well as the geometrical aspect of this theory. With this method we obtain a "master equation" that describes the behavior of gravitational perturbations that are of odd-parity in the Regge-Wheeler gauge. This equation is later applied to a specific class of Morris-Thorne wormholes and also to the metric of an asymptotically flat scalar field wormhole. The analysis of the equations that these space-times yield reveals that there are no unstable vibrational modes generated by the type of perturbations here studied.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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