Wiggly cosmic strings accrete dark energy

Details Wiggly cosmic strings accrete dark energy Wiggly cosmic strings accrete dark energy

2005-06-29

arxiv.org/abs/astro-ph/0506717v1

Int.J.Mod.Phys.D15:603-614,2006

Astronomy and Astrophysics

Astrophysics

6 pages, RevTex

Scientific paper

10.1142/S0218271806008322

This paper deals with a study of the cylindrically symmetric accretion of dark energy with equation of state $p=w\rho$ onto wiggly straight cosmic strings. We have obtained that when $w>-1$ the linear energy density in the string core gradually increases tending to a finite maximum value as time increases for all considered dark energy models. On the regime where the dominant energy condition is violated all such models predict a steady decreasing of the linear energy density of the cosmic strings as phantom energy is being accreted. The final state of the string after such an accretion process is a wiggleless defect. It is argued however that if accreation of phantom energy would proceed by successive quantum steps then the defect would continue losing linear energy density until a minimum nonzero value which can be quite smaller than that corresponding to the unperturbed string.

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