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arXiv 2007.12206gr-qc
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来自引力波记忆的持续天体测量偏转

Persistent Astrometric Deflections from Gravitational-Wave Memory

Dustin R. Madison

摘要:

引力波(GWs)在天空中可观测到的恒星分布中产生微小的扭曲。我们描述了一个特定的引力波形称为记忆爆发所产生的天体测量偏转的特征模式。记忆是一种永久性的、残留的空间扭曲,它是在全球变暖之后留下的。我们证明,GW内存的天体测量效果是定性的不同,从那些更广泛的考虑,振荡GWs-不同的方式与潜在的深远的观测影响。我们讨论了一些这样的影响有关的随机行走发展的记忆诱导偏转签名宇宙学的时间跨度,以及如何可能会影响观测的宇宙微波背景。

英文摘要:

Gravitational waves (GWs) produce small distortions in the observable distribution of stars in the sky. We describe the characteristic pattern of astrometric deflections created by a specific gravitational waveform called a burst with memory. Memory is a permanent, residual distortion of space left in the wake of GWs. We demonstrate that the astrometric effects of GW memory are qualitatively distinct from those of more broadly considered, oscillatory GWs---distinct in ways with potentially far-reaching observational implications. We discuss some such implications pertaining to the random-walk development of memory-induced deflection signatures over cosmological time spans and how those may influence observations 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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