Properties of realistic cosmic-string loops

Robert J. Scherrer; Jean M. Quashnock; David N. Spergel; William H. Press

doi:10.1103/PhysRevD.42.1908

Properties of realistic cosmic-string loops

Robert J. Scherrer, Jean M. Quashnock, David N. Spergel, William H. Press

Princeton University

Research output: Contribution to journal › Article › peer-review

22 Scopus citations

Abstract

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|l2=0.01. For gravitational radiation, (dEdt)G2 is strongly peaked in the region =40-60, with a distribution well fitted by p()=(122)exp[-(1-)222] , with =1.74×10-2 and =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.

Original language	American English
Pages (from-to)	1908-1914
Number of pages	7
Journal	Physical review D
Volume	42
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevD.42.1908
State	Published - 1990

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1103/PhysRevD.42.1908

Cite this

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title = "Properties of realistic cosmic-string loops",

abstract = "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|l2=0.01. For gravitational radiation, (dEdt)G2 is strongly peaked in the region =40-60, with a distribution well fitted by p()=(122)exp[-(1-)222] , with =1.74×10-2 and =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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T1 - Properties of realistic cosmic-string loops

AU - Scherrer, Robert J.

AU - Quashnock, Jean M.

AU - Spergel, David N.

AU - Press, William H.

PY - 1990

Y1 - 1990

N2 - 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|l2=0.01. For gravitational radiation, (dEdt)G2 is strongly peaked in the region =40-60, with a distribution well fitted by p()=(122)exp[-(1-)222] , with =1.74×10-2 and =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.

AB - 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|l2=0.01. For gravitational radiation, (dEdt)G2 is strongly peaked in the region =40-60, with a distribution well fitted by p()=(122)exp[-(1-)222] , with =1.74×10-2 and =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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Properties of realistic cosmic-string loops

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