Gravitational field around a screwed superconducting cosmic string in scalar-tensor theories

Abstract

We obtain the solution that corresponds to a screwed superconducting cosmic string (SSCS) in the framework of a general scalar-tensor theory including torsion. We investigate the metric of the SSCS in Brans-Dicke theory with torsion and analyze the case without torsion. We show that in the case with torsion the space-time background presents other properties different from that in which torsion is absent. When the spin vanish, this torsion is a $\varphi$-gradient and then it propagates outside of the string. We investigate the effect of torsion on the gravitational force and on the geodesics of a test-particle moving around the SSCS. The accretion of matter by wakes formation when a SSCS moves with speed $v$ is investigated. We compare our results with those obtained for cosmic strings in the framework of scalar-tensor theory.

22 pages, LaTeX, presented at the "XXII - Encontro Nacional de Fisica de Particulas e Campos", Sao Lourenco, MG, Brazil

References in corpus (5)

• Neutrino Oscillations Induced by Space-Time Torsion
• Current-Carrying Cosmic Strings in Scalar-Tensor Gravities
• Cosmic String Current Stability
• Cosmic String Wakes in Scalar-Tensor Gravities
• Screwed superconducting cosmic strings

Cited by in corpus (8)

• Cosmic strings in $f\left(R,L_m\right)$ gravity
• Lorentz-breaking effects in scalar-tensor theories of gravity
• Gravitational field around a time-like current-carrying screwed cosmic string in scalar-tensor theories
• Cosmic optical activity in the spacetime of a scalar-tensor screwed cosmic string
• Wakes in Dilatonic Current-Carrying Cosmic Strings
• Breakdown of the Mechanism of Forming Wakes by a Current-Carrying String
• A Discussion on Supersymmetric Cosmic Strings with Gauge-Field Mixing
• Supermassive screwed cosmic string in dilaton gravity