论文标题
正规化JNW和JMN裸奇异性
Regularising the JNW and JMN naked singularities
论文作者
论文摘要
我们将Simpson和Visser（SV）的方法扩展到将黑洞时空正规化的方法扩展到初始度量代表全球裸体奇异性的情况。我们选择两个代表Einstein-Scalar场系统解决方案的Janis-Newman-Winicour（JNW）指标，以及代表joshi-Malafarina-narayan（JMN）指标，代表代表偏置星星的无效平衡构型，该标准均应由切线构造的崩溃星星（启动配置）构造。我们说明了JNW和JMN SpaceTimes修改版本的几个新颖功能。特别是，我们表明，根据涉及的参数的值，修改后的JNW指标可能代表可遍历的两种可缠绕虫洞，或者可能保留原始的裸象。另一方面，SV修饰的JMN几何形状始终是虫洞。研究了这些新几何形状的粒子运动和观察方面，并显示出有趣的特征。我们还研究了正规化时空的不同分支的准模式，并探索了它们的稳定性。
We extend the method of Simpson and Visser (SV) of regularising a black hole spacetime, to cases where the initial metric represents a globally naked singularity. We choose two particular geometries, the Janis-Newman-Winicour (JNW) metric representing the solution of an Einstein-scalar field system, and the Joshi-Malafarina-Narayan (JMN) metric that represents the asymptotic equilibrium configuration of a collapsing star supported by tangential pressures as the starting configuration. We illustrate several novel features for the modified versions of the JNW and JMN spacetimes. In particular, we show that, depending on the values of the parameters involved the modified JNW metric may represents either a two way traversable wormhole or it may retain the original naked singularity. On the other hand, the SV modified JMN geometry is always a wormhole. Particle motion and observational aspects of these new geometries are investigated and are shown to posses interesting features. We also study the quasinormal modes of different branches of the regularised spacetime and explore their stability properties.
