The circular loop equation of a cosmic string with time-varying tension in de Sitter spacetimes

Details The circular loop equation of a cosmic string with time-varying tension in de Sitter spacetimes The circular loop equation of a cosmic string with time-varying tension in de Sitter spacetimes

2008-01-30

arxiv.org/abs/0801.4615v2

Int.J.Theor.Phys.48:1070-1075,2009

Physics

High Energy Physics

High Energy Physics - Theory

6 pages

Scientific paper

10.1007/s10773-008-9879-7

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 $r(t_{0})>0.707L$, L de Sitter radius, should not collapse to form a black holes. It is also found that in the case of $r(t_{0})<0.707L$ 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.

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