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arXiv 2501.14909astro-ph.CO
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Cuscuton类贡献对暗能量演化的影响

Cuscuton-like contribution to dark energy evolution

D. Bazeia, J. D. Dantas, S. Santos da Costa

AI总结:

本研究在FLRW背景下引入cuscuton项,利用一阶Hamilton-Jacobi框架求解暗能量演化方程,并通过几何观测数据和AIC准则验证,该模型获得强有力支持。

摘要:

本研究探讨了在通常的FLRW背景下,标准暗能量演化中cuscuton项的存在。我们揭示了一个类似于Hamilton-Jacobi形式的一阶框架,该框架有助于我们求解运动方程并找到解析解。我们探索了多种可能性,主要关注cuscuton类贡献如何改变宇宙演化。一些结果具有现实意义,因为它们描述了能够改变演化、在宇宙膨胀历史中添加或排除可能的不同阶段的场景。此外,我们利用一组均匀的几何观测探针,对暗能量演化中的cuscuton类贡献提出了有趣的约束。最后,基于Akaike信息准则(AIC),我们将cuscuton类模型与$\Lambda$CDM进行了统计比较,并发现我们的模型得到了强有力的支持。

英文摘要:

This work deals with the presence of the cuscuton term in the otherwise standard dark energy evolution under the usual FLRW background. We disclose a first-order framework similar to the Hamilton-Jacobi formalism, which helps us to solve the equations of motion and find analytical solutions. We explore several possibilities, concentrating mainly on how the cuscuton-like contribution works to modify cosmic evolution. Some results are of current interest since they describe scenarios capable of changing the evolution, adding or excluding possible distinct phases during the Universe's expansion history. Additionally, we present interesting constraints on the cuscuton-like contribution for the dark energy evolution using a set of homogeneous geometrical observational probes. Finally, based on the Akaike Information Criterion (AIC), we perform a statistical comparison of the cuscuton-like model with $Λ$CDM, and find strong support for our model.

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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