Eur. Phys. J. C (2016) 76: 546
https://doi.org/10.1140/epjc/s10052-016-4401-5

Regular Article - Theoretical Physics

Thin shells joining local cosmic string geometries

¹ Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria Pabellón I, 1428, Buenos Aires, Argentina
² Instituto de Astronomía y Física del Espacio (IAFE, CONICET-UBA), Casilla de Correo 67, Sucursal 28, 1428, Buenos Aires, Argentina
³ IFIBA–CONICET, Ciudad Universitaria Pabellón I, 1428, Buenos Aires, Argentina

^* e-mail: eiroa@iafe.uba.ar

Received: 17 August 2016
Accepted: 24 September 2016
Published online: 6 October 2016

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.