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arXiv 2301.01503astro-ph.COgr-qchep-th
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用非定域引力解决宇宙学张力

Addressing Cosmological Tensions by Non-Local Gravity

Filippo Bouchè, Salvatore Capozziello, Vincenzo Salzano

摘要:

近年来,替代宇宙学模型一直受到深入审查,旨在解决$Λ$ CDM模型的主要缺点。此外,随着宇宙学观测精度的提高,依赖模型的宇宙微波背景分析和低红移探测之间出现了新的紧张关系。在这个框架内,我们回顾了两个量子启发的非局部扩展引力理论,其主要的宇宙学特征是几何驱动的加速膨胀。特别是在哈勃和生长张力的光模型进行了研究,并出现了有前途的功能Deser-Woodard之一。一方面,宇宙学分析的唯象制定的模型显示出较低的增长的结构,但相当于背景的$Λ$ CDM。另一方面,在星系团尺度的透镜特征的研究,一个新的制定非本地宇宙学,基于诺特对称性,使空间的可能性,以减轻双方的$H_0$和$σ_8$紧张。然而,迫切需要一个筛选机制出现这种非局部引力理论。

英文摘要:

Alternative cosmological models have been under deep scrutiny in recent years, aiming to address the main shortcomings of the $Λ$CDM model. Moreover, as the accuracy of cosmological surveys improved, new tensions have risen between the model-dependent analysis of the Cosmic Microwave Background and lower redshift probes. Within this framework, we review two quantum-inspired non-locally extended theories of gravity, whose main cosmological feature is a geometrically driven accelerated expansion. The models are especially investigated in light of the Hubble and growth tension, and promising features emerge for the Deser--Woodard one. On the one hand, the cosmological analysis of the phenomenological formulation of the model shows a lowered growth of structures but an equivalent background with respect to $Λ$CDM. On the other hand, the study of the lensing features at the galaxy cluster scale of a new formulation of non-local cosmology, based on Noether symmetries, makes room for the possibility of alleviating both the $H_0$ and $σ_8$ tension. However, the urgent need for a screening mechanism arises for this non-local theory of gravity.

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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