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arXiv 2209.01068gr-qcastro-ph.COhep-ph
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超导宇宙弦的引力波发射

Emission of gravitational waves by superconducting cosmic strings

I. Yu. Rybak, L. Sousa

摘要:

研究了超导宇宙弦的引力辐射发射效率$Γ$。我们证明,通过使用一个可解模型的跨音速字符串,电流的存在导致抑制的引力发射的尖点,扭结和不同类型的循环。我们还表明,当电流存在时,发射的频谱与尖点的循环是指数抑制的谐波模式的增加,从而显着不同的幂律谱无电流的循环。此外,我们还建立了$Γ$与宇宙弦电流值之间的唯象关系。我们推测,这个关系应该是有效的任意类型的载流字符串。我们利用这一结果来研究电流对宇宙弦产生的随机引力波背景的潜在影响,并表明谱的振幅和形状可能会受到显着影响。

英文摘要:

We study the gravitational radiation emission efficiency $Γ$ of superconducting cosmic strings. We demonstrate, by using a solvable model of transonic strings, that the presence of a current leads to a suppression of the gravitational emission of cusps, kinks and different types of loops. We also show that, when a current is present, the spectrum of emission of loops with cusps is exponentially suppressed as the harmonic mode increases, thus being significantly different from the power law spectrum of currentless loops. Furthermore, we establish a phenomenological relationship between $Γ$ and the value of the current on cosmic strings. We conjecture that this relation should be valid for an arbitrary type of current-carrying string. We use this result to study the potential impact of current on the stochastic gravitational wave background generated by cosmic strings with additional degrees of freedom and show that both the amplitude and shape of the spectrum may be significantly affected.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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