A high-significance detection of primordial tidal torque imprints

IF 15.2 1区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS

Nature Astronomy Pub Date : 2026-08-05 DOI:10.1038/s41550-026-02948-w

Ming-Jie Sheng, Hao-Ran Yu, Min Bao, Bing-Hang Chen, Fang-Na Shao, Qi Guo, Yan-Mei Chen, Huiyuan Wang, Ue-Li Pen, Jie Wang, Xiaohu Yang

引用次数: 0

Abstract

Tidal-torque theory predicts that galaxy angular momenta are imprinted by the primordial tidal field acting on proto-structures and that they can retain information about the early Universe through cosmic evolution. Here we test this prediction by comparing observed galaxy angular momentum vectors with those predicted from the primordial density field reconstructed by ELUCID for the nearby Universe. Among the galaxy populations considered, the gas component of central massive elliptical galaxies provides the clearest signal, exhibiting a strong direction correlation at a significance of about 7σ. These results provide robust observational evidence for tidal-torque theory and open a window for cosmological measurements of neutrino mass and other cosmological parameters.

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原始潮汐扭矩印记的高显著性检测

潮汐扭矩理论预测，星系角动量是由作用于原始结构的原始潮汐场留下的印记，它们可以通过宇宙演化保留有关早期宇宙的信息。这里，我们通过比较观测到的星系角动量向量与由lucid重建的邻近宇宙的原始密度场预测的角动量向量来验证这一预测。在考虑的星系群中，中央大质量椭圆星系的气体组分提供了最清晰的信号，表现出很强的方向相关性，显著性约为7σ。这些结果为潮汐扭矩理论提供了有力的观测证据，并为中微子质量和其他宇宙学参数的宇宙学测量打开了一扇窗。

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来源期刊

Nature Astronomy Physics and Astronomy-Astronomy and Astrophysics

CiteScore

19.50

自引率

2.80%

发文量

252

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