基于曲率的高阶约束对 f(R,Lm) 引力的影响

IF 3 3区 物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY Annals of Physics Pub Date : 2024-08-30 DOI:10.1016/j.aop.2024.169781
J.K. Singh , Shaily , Akanksha Singh , Harshna Balhara , Joao R.L. Santos
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引用次数: 0

摘要

在这项研究中,我们对 f(R,Lm) 引力理论进行了观测统计分析。提出的理论模型是基于利玛窦标量的非线性贡献。我们对减速参数采用了不同的参数化方法,并利用各种观测数据对模型参数进行约束。为了确定宇宙学参数的最佳拟合模型,我们使用了不同的观测数据集,如哈勃太空望远镜、先贤祠超新星巡天、黄金数据集、伽马射线暴(GRB)和重子声学振荡(BAO)。此外,我们还详细研究了宇宙的晚期宇宙演化,并考察了宇宙学参数约束值的影响。此外,我们还与标准宇宙学模型ΛCDM 和 Odintsov 等人(2024 年)、Odintsov 等人(2023 年)获得的其他标准模型进行了全面比较,以检验我们提出的模型在低红移机制下的有效性。最后,我们发现所提出的模型包含了一个从高红移早期减速到低红移加速的有趣过渡,一个五重暗能量情景,以及在晚期宇宙演化中向成熟的ΛCDM模型的收敛。
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The consequence of higher-order curvature-based constraints on f(R,Lm) gravity

In this investigation, we perform an observational statistical analysis in the theory of f(R,Lm) gravity. The proposed theoretical model is based on the Ricci scalar’s non-linear contribution. We use a distinct parametrization for the deceleration parameter and constrain the model parameters by using various observational data. To determine the best-fit model for the cosmological parameters, we use different observational datasets such as the Hubble Space Telescope, the Pantheon Supernova Survey, the Gold dataset, the Gamma-Ray Burst (GRB), and the Baryon Acoustic Oscillations (BAO). Furthermore, we study the late-time cosmic evolution of the Universe in detail and examine the implications of the constraint values on cosmological parameters. Additionally, we conduct a thorough comparison with the standard cosmological model ΛCDM and other standard models obtained by Odintsov et al. (2024); Odintsov et al. (2023) to examine the validity of our proposed model in the low-redshift regimes. Finally, we find that the proposed model encapsulates an intriguing transition from early deceleration at high redshift to acceleration at low redshift, a quintessence dark energy scenario, and convergence towards the well-established ΛCDM model in late-time Universe’s evolution.

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来源期刊
Annals of Physics
Annals of Physics 物理-物理:综合
CiteScore
5.30
自引率
3.30%
发文量
211
审稿时长
47 days
期刊介绍: Annals of Physics presents original work in all areas of basic theoretic physics research. Ideas are developed and fully explored, and thorough treatment is given to first principles and ultimate applications. Annals of Physics emphasizes clarity and intelligibility in the articles it publishes, thus making them as accessible as possible. Readers familiar with recent developments in the field are provided with sufficient detail and background to follow the arguments and understand their significance. The Editors of the journal cover all fields of theoretical physics. Articles published in the journal are typically longer than 20 pages.
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