Cosmic strings and gravitational waves

被引：4

作者：

Sousa, Lara ^{[1
,2
]}

机构：

[1] Univ Porto, Ctr Astrofis, Inst Astrofis & Ciencias Espaco, Rua Estrelas, P-4150762 Oporto, Portugal

[2] Fac Ciencias, Dept Fis & Astron, Rua Campo Alegre 687, P-4169007 Porto, Portugal

来源：

GENERAL RELATIVITY AND GRAVITATION | 2024年 / 56卷 / 09期

关键词：

Cosmic string; Topological defects; Gravitational waves; Early universe; RADIATION; SPECTRUM;

D O I：

10.1007/s10714-024-03293-x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Cosmic string networks are expected to generate a characteristic stochastic gravitational wave background that may be within the reach of current and upcoming gravitational wave detectors. A detection of this spectrum would provide invaluable information about the physics of the early universe, as it would allow us to probe the sequence of phase transitions that happened in the distant past. Here, I review the emission of gravitational waves by Nambu-Goto cosmic strings-thin cosmic strings that couple strongly to gravity only-and by superconducting strings-strings that carry electromagnetic currents. A comparison between the stochastic gravitational wave background predicted in these two very distinct string-forming scenarios reveals that this spectrum may have signatures that may allows us to discriminate between them observationally. The stochastic gravitational wave background generated by cosmic string networks may then enable us to uncover not only the energy-scale of the string-forming phase transition, but the underlying particle physics scenario as well.

引用

页数：24

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