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arXiv 2108.07034astro-ph.COhep-ph
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气泡碰撞产生的引力波的模型无关特征

Model-independent features of gravitational waves from bubble collisions

Ariel Megevand, Agustin Membiela

摘要:

研究了宇宙学相变中气泡壁或薄流体壳层碰撞产生的引力辐射。利用所谓的包络近似,我们解析地得到了任意相变模型的引力波谱在低频和高频的渐近行为。因此,完整的频谱可以通过这些渐近线之间的简单插值来近似。我们验证这种近似与具体的例子。我们使用这些结果来讨论的频谱上的时间和源的大小尺度的依赖性。

英文摘要:

We study the gravitational radiation produced by the collisions of bubble walls or thin fluid shells in cosmological phase transitions. Using the so-called envelope approximation, we obtain analytically the asymptotic behavior of the gravitational wave spectrum at low and high frequencies for any phase transition model. The complete spectrum can thus be approximated by a simple interpolation between these asymptotes. We verify this approximation with specific examples. We use these results to discuss the dependence of the spectrum on the time and size scales of the source.

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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