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arXiv 1609.02785astro-ph.COgr-qchep-th
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在引力波背景中用方向变化探测暴胀前各向异性

Probing pre-inflationary anisotropy with directional variations in the gravitational wave background

Yu Furuya, Yuki Niiyama, Yuuiti Sendouda

摘要:

我们进行了详细的分析,在一个类似卡斯纳的预膨胀阶段,允许一般的三轴各向异性放大的原始引力波背景。结果表明,预测的大尺度引力波强度角分布图根据暴胀前各向异性的程度呈现出不同的拓扑模式,从而为未来的引力波全天观测提供了一个可能的暴胀前早期宇宙的探测器.我们还从宇宙微波背景的B模偏振中导出了这种各向异性引力波振幅的观测极限。

英文摘要:

We perform a detailed analysis on a primordial gravitational-wave background amplified during a Kasner-like pre-inflationary phase allowing for general triaxial anisotropies. It is found that the predicted angular distribution map of gravitational-wave intensity on large scales exhibits topologically distinctive patterns according to the degree of the pre-inflationary anisotropy, thereby serving as a potential probe for the pre-inflationary early universe with future all-sky observations of gravitational waves. We also derive an observational limit on the amplitude of such anisotropic gravitational waves from the B-mode polarisation of the cosmic microwave background.

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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