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nderstanding tensions in cosmological measurements

nderstanding tensions in cosmological measurements
了解宇宙学测量中的张力
批准号:
2466414
负责人:
金额:
$0.0万
依托单位:
依托单位国家:
英国
项目类别:
Studentship
财政年份:
2020
资助国家:
英国
项目状态:
未结题
起止时间:
2020 至 --

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中文摘要
翻译
目前,在宇宙学探测器的测量中有几个重要的紧张局势。首先,宇宙当前的膨胀率被发现有相当显著的对比值,这取决于膨胀是从附近的探测器(例如超新星和距离阶梯)还是从遥远的探测器(宇宙微波背景)推断的。第二,当从附近的探测器(例如弱透镜)或遥远的探测器(宇宙微波背景)推断时,发现当前宇宙中物质聚集的数量是不同的。该项目将力求:(a)整理和评估目前报告的测量结果,特别侧重于找出张力的真正所在;(B)找出新的暗能量和引力理论能够解释张力的成功程度;(c)利用完整的暗能量调查来测量张力。
英文摘要
There are currently several important tensions in the measurements of cosmological probes. Firstly,the current expansion rate of the Universe is found to have fairly significantly contrasting valuesdepending on whether expansion is inferred from nearby probes (e.g. supernovae together with thedistance ladder) or distant ones (the Cosmic Microwave Background). Secondly, the amount ofclustering of material in the current Universe is found to be different when inferred from nearby probes(e.g. weak lensing) or distant ones (the Cosmic Microwave Background).What is going on? This project will seek to (a) collate and assess the current reported measurements,particularly focusing on finding where the tensions really lie; (b) find the level of success with whichnew dark energy and gravity theories can account for the tensions; (c) engage in measuring thetensions with the full Dark Energy Survey.Embedding Gravitational
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