The circular loop equation of a cosmic string with time-varying tension in de Sitter spacetimes
arXiv:0801.4615 · doi:10.1007/s10773-008-9879-7
Abstract
In this work the equation of circular loops of cosmic string possessing time-dependent tension is studied in the de Sitter spacetime. We find that the cosmic string loops with initial radius , L de Sitter radius, should not collapse to form a black holes. It is also found that in the case of a loop of cosmic string whose tension depends on some power of cosmic time can not become a black hole if the power is lower than a critical value which is associated with the initial size of the loop.
6 pages
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