Cosmic String Cusps with Small-Scale Structure: Their Forms and Gravitational Waveforms

Details Cosmic String Cusps with Small-Scale Structure: Their Forms and Gravitational Waveforms Cosmic String Cusps with Small-Scale Structure: Their Forms and Gravitational Waveforms

2003-07-28

arxiv.org/abs/gr-qc/0307113v2

Phys.Rev. D68 (2003) 085017

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

RevTeX, 8 pages. Replaced with version accepted for publication by PRD

Scientific paper

10.1103/PhysRevD.68.085017

We present a method for the introduction of small-scale structure into strings constructed from products of rotation matrices. We use this method to illustrate a range of possibilities for the shape of cusps that depends on the properties of the small-scale structure. We further argue that the presence of structure at cusps under most circumstances leads to the formation of loops at the size of the smallest scales. On the other hand we show that the gravitational waveform of a cusp remains generally unchanged; the primary effect of small-scale structure is to smooth out the sharp waveform emitted in the direction of cusp motion.

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