论文标题
镜头宇宙漂移
Lensing cosmic drift
论文作者
论文摘要
随着宇宙的扩展，遥远来源的红移随时间变化。在这里，我们讨论了重力镜头现象，这是镜头源，引力透镜和观察者之间红移漂移的结果。当源非常接近漂流的苛性菜时，由于宇宙学的扩展，可能会发生一对图像（或消失）。此外，镜头系统充当红移漂移的信号转换器。已经存在的多个图像的角位置，放大，失真和时间延迟发生了变化。我们估计这些现象的预期频率以及在深度和大型调查时期观察它们的前景。图像分离中的漂移检测可以在下一代调查的范围内，$μ$ ARCSEC角度分辨率。
As the Universe expands, the redshift of distant sources changes with time. Here we discuss gravitational lensing phenomena that are consequence of the redshift drift between lensed source, gravitational lens, and observer. When the source is located very close to the drifting caustics, a pair of images could occur (or disappear) because of the cosmological expansion. Furthermore, lensing systems act as signal converters of the redshift drift. The angular position, magnification, distortion, and time delay of already existing multiple images change. We estimate the expected frequency of these phenomena and the prospects to observe them in the era of deep and large surveys. The drift detection in image separation could be within reach of next generation surveys with $μ$arcsec angular resolution.
