Gravitational wave spectrum from kinks on infinite cosmic strings with Y-junctions
Gravitational wave spectrum from kinks on infinite cosmic strings with Y-junctions
复制标题
来自具有 Y 形结的无限宇宙弦扭结的引力波谱
DOI:
10.1088/1475-7516/2020/11/039
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发表时间:
2020
影响因子:
6.4
通讯作者:
Kuroyanagi Sachiko
中科院分区:
文献类型:
--
作者:
Matsui Yuka;Horiguchi Koichiro;Nitta Daisuke;Kuroyanagi Sachiko
We calculate the gravitational wave (GW) background spectrum from kink-kink collisions on infinite cosmic strings by taking into account the effect of Y-junctions. A kink going through a Y-junction transforms into three daughter kinks. In this way, the existence of Y-junctions also increases the number of kinks on cosmic strings with Y-junctions. However, at the same time, it smooths out the sharpness of kinks rapidly and reduces the number of sharp kinks, which are responsible for the emissions of strong GW bursts. We compute the number distribution of kinks as a function of the sharpness by taking into account the effect of Y-junctions and translate it to the amplitude of the GW background spectra. We first investigate the case of the string network with equal string tensions and find that the effect of Y-junctions to smooth out kink sharpness dominates that of the enhancement of the kink number by a small reconnection probability, and the GW amplitude turns out to be smaller than the ordinary cosmic string case. On the other hand, for non-equal string tensions, we find that the GW spectrum does not change significantly compared to the equal-tension case.
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影响因子:
5
作者:
E. Copeland;T. Nottingham;I. -. London
通讯作者:
E. Copeland;T. Nottingham;I. -. London
DOI:
--
发表时间:
2006
期刊:
影响因子:
--
作者:
M. Hindmarsh;P. Saffin
通讯作者:
P. Saffin
DOI:
--
发表时间:
1987
期刊:
Physical Review D, Particles and fields
影响因子:
--
作者:
Vachaspati.;Vilenkin
通讯作者:
Vilenkin
影响因子:
5
作者:
Avgoustidis A
通讯作者:
Avgoustidis A
影响因子:
5
作者:
A. Jenkins;M. Sakellariadou
通讯作者:
M. Sakellariadou