Dilatonic, Current-Carrying Cosmic String
C. N. Ferreira, M. E. X. Guimaraes, J. A. Helayel-Neto
Abstract
We study the implications of a scalar-tensorial gravity for the metric of an isolated self-gravitating superconducting cosmic string. These modifications are induced by an arbitrary coupling of a massless scalar field to the usual tensorial field in the gravitational Lagrangian. We derive the metric in the weak-field approximation and we analyse the behaviour of light in this spacetime. We end with some discussions.
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