Publication: Stringy cosmic strings with horizons
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1990-04-19
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Elsevier Science BV
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Abstract
It is shown that any sigma model coupled to gravity with a target space having closed geodesics admits singular cosmic string solutions with event horizons. We also prove that if one makes the general assumption of boost symmetric sources, non-singular solutions of this type cannot exist. The case of the target manifold being the fundamental domain of the modular group PSL(2,¢Z) is discussed in detail.
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Copyright © 1990 Published by Elsevier B.V.
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