Backreaction on an infinite helical cosmic string

To understand the properties of a possible cosmic string network requires knowledge of the structures on long strings, which control the breaking off of smaller loops. These structures are influenced by backreaction due to gravitational wave emission. To gain an understanding of this process, we cal...

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Bibliographic Details
Published in:Physical review. D 2019-11, Vol.100 (10), p.1, Article 103512
Main Authors: Robbins, Ken W., Olum, Ken D.
Format: Article
Language:English
Subjects:
Gravitational waves
Mathematical analysis
Standing waves
Strings
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Summary:To understand the properties of a possible cosmic string network requires knowledge of the structures on long strings, which control the breaking off of smaller loops. These structures are influenced by backreaction due to gravitational wave emission. To gain an understanding of this process, we calculate the effect of gravitational backreaction on the "helical breather," an infinite cosmic string with a helical standing wave. We do the calculation analytically to first order in the amplitude of the oscillation. Our results for the rate of loss of length agree with the total power emitted from this system as calculated by Sakellariadou. We also find a rotation of the generators of the string that leads to an advancement of the phase of the oscillation in addition to that produced by the loss of length.
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.100.103512