Cosmological cosmic strings
Abstract
We investigate the effect of an infinite cosmic string on a cosmological background. We find that the metric is approximately a scaled version of the emptyspace string metric, i.e., conical in nature. We use our results to place bounds on the amount of cylindrical gravitational radiation currently emitted by such a string. We then analyze explicitly the gravitational radiation equations and show that even initially large disturbances are rapidly damped as the expansion proceeds. The implications for the gravitational radiation background and the limitations of the quadrupole formula are discussed.
 Publication:

Physical Review D
 Pub Date:
 April 1989
 DOI:
 10.1103/PhysRevD.39.2108
 Bibcode:
 1989PhRvD..39.2108G
 Keywords:

 98.80.Dr;
 04.20.Jb;
 98.80.Cq;
 Exact solutions;
 Particletheory and fieldtheory models of the early Universe