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Abstract: We discuss cosmic Nielsen-Olesen strings in space-times endowed with apositive cosmological constant. For the cylindrically symmetric, static freecosmic string, we discuss the contribution of the cosmological constant to theangle deficit, and to the motion of the null-timelike geodesics. For anon-gravitating cosmic string in a Schwarzschild-de Sitter space-time, wediscuss how a thin string can pierce the two horizons. We also present a metricwhich describes the exterior of a self gravitating thin string present in theSchwarzschild-de Sitter space-time.



Autor: Sourav Bhattacharya, Amitabha Lahiri

Fuente: https://arxiv.org/







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