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arXiv 2201.05796astro-ph.COastro-ph.IM
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星系团中的引力透镜和微透镜:星系团作为暗物质望远镜

Gravitational Lensing and Microlensing in Clusters: Clusters as Dark Matter Telescopes

Margarita Safonova

摘要:

引力透镜是由于前景光源的光线偏转而使背景物体变亮。丰富的星系团是非常有效的透镜,因为它们集中在中心。这种天然的引力望远镜为我们提供了强烈放大的高红移星系,否则太暗而无法检测或分析。有了透镜增强,我们可以研究在“黑暗时代”结束时闪耀的星系。我们建议利用大视场和深度所提供的机会,在集群临界曲线附近搜索由前景集群放大的源,其中增强可以是几十个亮度。另一个方面是微透镜(ML),我们想继续在几周到几年的时间尺度上对一些银河系球状星团进行调查,以寻找从行星到假设的中央中等质量黑洞(IMBH)的ML事件。

英文摘要:

Gravitational lensing is brightening of background objects due to deflection of light by foreground sources. Rich clusters of galaxies are very effective lenses because they are centrally concentrated. Such natural Gravitational Telescopes provide us with strongly magnified galaxies at high redshifts otherwise too faint to be detected or analyzed. With a lensing boost, we can study galaxies shining at the end of the `Dark Ages'. We propose to exploit the opportunity provided by the large field of view and depth, to search for sources magnified by foreground clusters in the vicinity of the cluster critical curves, where enhancements can be of several tens in brightness. Another aspect is microlensing (ML), where we would like to continue our survey of a number of Galactic globular clusters over time-scales of weeks to years to search for ML events from planets to hypothesized central intermediate-mass black holes (IMBH).

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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