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arXiv 2105.01166astro-ph.COgr-qchep-phhep-th
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超导宇宙弦的21厘米吸收信号

Global 21cm Absorption Signal from Superconducting Cosmic Strings

Roxane Thériault, Jordan T. Mirocha, Robert Brandenberger

备注：
8 pages, 3 figures
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摘要：

超导的宇宙弦在复合和再电离之间会发出电磁波。因此，它们对全球21 cm信号有影响。我们计算得到的吸收功能，重点是与临界电流的字符串，研究其依赖于弦张力$μ$，并与观测结果进行比较。对于$G μ= 10^{-10}$（$G$是牛顿引力常量）范围内的弦张力，有两个特征吸收特征的有趣放大，一个是在宇宙黎明时期的$z \lesssim 30$，另一个是在宇宙黑暗时期的$z \sim 80$，前者的振幅与EDGES实验观察到的相当。

英文摘要：

Superconducting cosmic strings emit electromagnetic waves between the times of recombination and reionization. Hence, they have an effect on the global 21cm signal. We compute the resulting absorption features, focusing on strings with critical current, study their dependence on the string tension $μ$, and compare with observational results. For string tensions in the range of $G μ= 10^{-10}$, where $G$ is Newton's gravitational constant, there is an interesting amplification of the two characteristic absorption features, one during the cosmic dawn, $z \lesssim 30$, and the other during the cosmic dark age, $z \sim 80$, the former being comparable in amplitude to what was observed by the EDGES experiment.

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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