Title: Thin shells joining local cosmic string geometries Show Chinese title

Title: 薄壳连接局部宇宙弦几何结构

Abstract: In this article we present a theoretical construction of spacetimes with a thin shell that joins two different local cosmic string geometries. We study two types of global manifolds, one representing spacetimes with a thin shell surrounding a cosmic string or an empty region with Minkowski metric, and the other corresponding to wormholes which are not symmetric across the throat located at the shell. We analyze the stability of the static configurations under perturbations preserving the cylindrical symmetry. For both types of geometries we find that the static configurations can be stable for suitable values of the parameters. Show Chinese abstract

Abstract: 在本文中，我们提出了一个理论构造，该构造涉及具有薄壳的时空，该薄壳连接两种不同的局部宇宙弦几何结构。 我们研究了两种类型的全局流形，一种表示具有包围宇宙弦或具有闵可夫斯基度规的空区域的薄壳的时空，另一种对应于不在壳处的喉部对称的虫洞。 我们分析了在保持圆柱对称性的扰动下静态配置的稳定性。 对于这两种几何结构，我们发现静态配置在参数取适当值时可以是稳定的。