论文标题
重力波记忆的持续性星形偏转
Persistent Astrometric Deflections from Gravitational-Wave Memory
论文作者
论文摘要
引力波（GWS）在天空中恒星的可观察到的分布中产生较小的扭曲。我们描述了由特定的引力波形所产生的天文偏转的特征模式，称为“带有内存的爆发”。记忆是GWS之后留下的永久残余空间变形。我们证明，GW记忆的星体效应在质量上与更广泛的振荡GWS不同 - 与潜在的深远观察性含义不同。我们讨论了与宇宙学时间跨度记忆诱导的挠度特征的随机步行有关的一些含义，以及这些含义如何影响宇宙微波背景的观察结果。
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.
