Dilatonic global strings
arXiv:gr-qc/9802015 · doi:10.1103/PhysRevD.58.023502
Abstract
We examine the field equations of a self-gravitating global string in low energy superstring gravity, allowing for an arbitrary coupling of the global string to the dilaton. Massive and massless dilatons are considered. For the massive dilaton the spacetime is similar to the recently discovered non-singular time-dependent Einstein self-gravitating global string, but the massless dilaton generically gives a singular spacetime, even allowing for time-dependence. We also demonstrate a time-dependent non-singular string/anti-string configuration, in which the string pair causes a compactification of two of the spatial dimensions, albeit on a very large scale.
18 pages RevTeX, 3 figures, references amended
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Cited by in corpus (9)
- Nonsingular global string compactifications
- Gravity of higher-dimensional global defects
- Spacetime structure of the global vortex
- Superconducting cosmic string in Brans-Dicke theory
- Nonsingular deformations of singular compactifications, the cosmological constant, and the hierarchy problem
- Line Sources in Brans-Dicke Theory of Gravity
- Cosmic strings in axionic-dilatonic gravity
- Nonstatic global string in Brans-Dicke theory
- Global Monopole metric in 2+1-dimensions