Properties of realistic cosmic-string loops

Details Properties of realistic cosmic-string loops Properties of realistic cosmic-string loops

Sep 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990phrvd..42.1908s&link_type=abstract

Physical Review D (Particles and Fields), Volume 42, Issue 6, 15 September 1990, pp.1908-1914

Physics

16

Scientific paper

We examine the angular momentum, gravitational radiation, number of kinks, and electromagnetic self-interaction for cosmic-string loops produced in a numerical simulation of loop fragmentation. The final distributions of both the string angular momenta and the power radiated in gravitational radiation appear to be independent of the initial conditions. The median specific angular momentum is ||J||/μl2=0.01. For gravitational radiation, γ==(dE/dt)/Gμ2 is strongly peaked in the region γ=40-60, with a distribution well fitted by p(γ)=(1/ √2π σγ2)exp[-(1/γ-μ)2/2σ2], with μ=1.74×10-2 and σ=5.85×10-3. Most stable daughter loops have between 2 and 5 kinks. Electromagnetic self-interaction can give rise to exponentially growing ac currents on highly asymmetric ``random'' loop trajectories. This dynamo property is not correlated with either self-intersection of the loops or with their angular momentum.

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