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arXiv 2602.24154astro-ph.CO
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弱引力透镜高阶统计量用于区分广义相对论与修改引力

Weak lensing higher-order statistics to disentangle modified gravity and massive neutrinos

INAF - Osservatorio Astronomico di Roma(意大利国家天体物理研究所罗马天文台);INFN - Sezione di Roma(意大利国家核物理研究所罗马分部);Tor Vergata University(托尔维加塔大学);Sapienza Università di Roma(罗马第一大学);Aix-Marseille Université(艾克斯-马赛大学);Scuola Superiore Meridionale(南方高等学院);INFN - Sezione di Napoli(意大利国家核物理研究所那不勒斯分部);Dipartimento di Fisica e Astronomia, Università di Bologna(博洛尼亚大学物理与天文系);INAF - Osservatorio di Astrofisica e Scienza dello Spazio di Bologna(意大利国家天体物理研究所博洛尼亚天文与空间科学观测站)

Alessandro Vadalà, Vincenzo Fabrizio Cardone, Simone Vinciguerra, Filippo Bouchè, Marco Baldi, Carlo Giocoli

AI总结:

本文通过弱引力透镜高阶统计量区分广义相对论与修改引力,并考虑中微子质量的影响。

摘要:

在弱引力透镜(WL)统计量中超越二次阶已知可以打破宇宙学参数之间的退化。在此,我们进一步研究高阶统计量(HOS)在弱引力透镜中是否能够区分广义相对论(GR)和修改引力(MG),同时考虑中微子质量的存在。为此,我们依赖于从广义相对论和$ f(R) $引力N-体模拟中获得的模拟收敛图,寻找MG特征在一系列高阶WL探测器中的表现。我们依靠不同的指标来量化每个探测器的判别能力,同时改变测量设置。我们发现,WL HOS确实能够在存在中微子质量的情况下区分MG和GR。

英文摘要:

Going beyond second order in weak lensing (WL) statistics is known to break degeneracies among cosmological parameters. We take a step further here, investigating whether higher-order statistics (HOS) in weak lensing can disentangle among General Relativity (GR) and modified gravity (MG), also taking into account the presence of massive neutrinos. To this end, we rely on mock convergence maps obtained from GR and $f(R)$ gravity N - body simulations, and we look for MG signatures in a wide set of higher-order WL probes. We rely on different metrics to quantify the discriminatory power of each probe, also varying the measurement setup. We find out that WL HOS can indeed disentangle MG and GR also in the presence of massive neutrinos.

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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