Improved calculation of the gravitational wave spectrum from kinks on infinite cosmic strings

Gravitational wave observations provide unique opportunities to search for cosmic strings. One of the strongest sources of gravitational waves is discontinuities of cosmic strings, called kinks, which are generated at points of intersection. Kinks on infinite strings are known to generate a gravitat...

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Bibliographic Details
Published in:Journal of cosmology and astroparticle physics 2016-11, Vol.2016 (11), p.5-5
Main Authors: Matsui, Yuka, Horiguchi, Koichiro, Nitta, Daisuke, Kuroyanagi, Sachiko
Format: Article
Language:English
Subjects:
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
COMPUTERIZED SIMULATION
COSMOLOGY
DISTRIBUTION
DISTRIBUTION FUNCTIONS
EVOLUTION EQUATIONS
FORECASTING
GRAVITATIONAL WAVES
SPECTRA
STRING MODELS
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Summary:Gravitational wave observations provide unique opportunities to search for cosmic strings. One of the strongest sources of gravitational waves is discontinuities of cosmic strings, called kinks, which are generated at points of intersection. Kinks on infinite strings are known to generate a gravitational wave background over a wide range of frequencies. In this paper, we calculate the spectrum of the gravitational wave background by numerically solving the evolution equation for the distribution function of the kink sharpness. We find that the number of kinks for small sharpness is larger than the analytical estimate used in a previous work, which makes a difference in the spectral shape. Our numerical approach enables us to make a more precise prediction on the spectral amplitude for future gravitational wave experiments.
ISSN:1475-7516
1475-7516
DOI:10.1088/1475-7516/2016/11/005