arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2007.08496astro-ph.CO
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量化ACT、SPT和Planck之间的整体参数张力

Quantifying the global parameter tensions between ACT, SPT and Planck

Will Handley, Pablo Lemos

摘要:

阿塔卡马宇宙学望远镜2020(ACT)和普朗克2018年数据之间的整体宇宙学参数张力在和谐宇宙学模型中使用可疑统计量量化为2.6 $σ$。我们发现ACT和南极望远镜(SPT)之间的张力为2.4 $σ$,ACT和普朗克+SPT之间的张力为2.8 $σ$。虽然目前还不清楚这种紧张是由统计波动、系统效应还是新物理学引起的,但在将这些宇宙微波背景数据集与宇宙的$Λ$ CDM标准模型结合起来时应谨慎行事。

英文摘要:

The overall cosmological parameter tension between the Atacama Cosmology Telescope 2020 (ACT) and Planck 2018 data within the concordance cosmological model is quantified using the suspiciousness statistic to be 2.6$σ$. Between ACT and the South Pole Telescope (SPT) we find a tension of 2.4$σ$, and 2.8$σ$ between ACT and Planck+SPT combined. While it is unclear whether the tension is caused by statistical fluctuations, systematic effects or new physics, caution should be exercised in combining these cosmic microwave background datasets in the context of the $Λ$CDM standard model of the universe.

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