Electromagnetic field near cosmic string

Abstract

The retarded Green function of the electromagnetic field in spacetime of a straight thin cosmic string is found. It splits into a geodesic part (corresponding to the propagation along null rays) and to the field scattered on the string. With help of the Green function the electric and magnetic fields of simple sources are constructed. It is shown that these sources are influenced by the cosmic string through a self-interaction with their field. The distant field of static sources is studied and it is found that it has a different multipole structure than in Minkowski spacetime. On the other hand, the string suppresses the electric and magnetic field of distant sources--the field is expelled from regions near the string.

12 pages, 8 figures (low-resolution figures; for the version with high-resolution figures see http://utf.mff.cuni.cz/~krtous/papers/), v2: two references added, typos corrected

References in corpus (6)

• Cosmic String Production Towards the End of Brane Inflation
• Fundamental cosmic strings
• CSL-1: a chance projection effect or serendipitous discovery of a gravitational lens induced by a cosmic string?
• Accelerated black holes in an anti-de Sitter universe
• Anomalous Fluctuations in Observations of Q0957+561 A,B: Smoking Gun of a Cosmic String?
• Hubble Imaging Excludes Cosmic String Lens

Cited by in corpus (3)

• Probing cosmic string spacetime through parameter estimation
• Self-force on an electric dipole in the spacetime of a cosmic string
• Self-force on a static particle near a black hole