2024-03-29T02:23:00Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00024413
2023-01-16T04:29:19Z
2026:2027:2028
Anisotropies in the gravitational wave background as a probe of the cosmic string network
Kuroyanagi, Sachiko
72328
Takahashi, Keitaro
72329
Yonemaru, Naoyuki
72330
Kumamoto, Hiroki
72331
Pulsar timing arrays are powerful tools to test the existence of cosmic strings by searching for the gravitational wave (GW) background. The amplitude of the background connects to information on cosmic strings such as the tension and string network properties. In addition, one may be able to extract more information on the properties of cosmic strings by measuring anisotropies in the GW background. In this paper, we provide estimates of the level of anisotropy expected in the GW background generated by cusps on cosmic strings. We find that the anisotropy level strongly depends on the initial loop size α, and thus we may be able to put constraints on α by measuring the anisotropy of the GW background. We also find that certain regions of the parameter space can be probed by shifting the observation frequency of GWs.
journal article
American Physical Society
2017-02-15
application/pdf
Physical Review D
4
95
043531
043531
https://doi.org/10.1103/PhysRevD.95.043531
http://hdl.handle.net/2237/26623
2470-0010
https://nagoya.repo.nii.ac.jp/record/24413/files/PhysRevD95_043531.pdf
eng
https://doi.org/10.1103/PhysRevD.95.043531
© 2017 American Physical Society