通过重子声学振荡对霍拉瓦-利夫希茨引力框架内的暗能量参数化进行宇宙学检验

H. Chaudhary, S. Pacif, U. Debnath, Prof. Farook Rahman, G. Mustafa
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摘要

我们正在进行一项研究,在霍拉瓦-利夫希茨引力框架内,通过各种暗能量参数化(韦特里希、埃夫斯塔修和马-张)探索晚期宇宙加速。作为广义相对论的替代理论,该理论在紫外尺度上引入了各向异性缩放。我们的主要目标是利用最近星系巡天得出的 24 个不相关的重子声学振荡(BAO)测量值来约束关键宇宙参数和重子声学振荡(BAO)尺度,特别是声平线($r_{d}$),其红移范围从 $z = 0.106$ 到 $z = 2.33$。此外,我们还将 Riess 在 2022 年测量的最新哈勃常数(记为 R22)作为额外先验值进行了整合。对于 Wettrich、Efstathiou 和 Ma-Jhang,我们对重子声学振荡(BAO)数据的分析得出的声平线结果为 $r_{d}=148。1560 \pm 2.7688 \mathrm{Mpc}$、$r_{d}=148.6168 \pm 10.2469 \mathrm{Mpc}$和$r_{d}=147.9737 \pm 10.6096 \mathrm{Mpc}$。将R22先验值纳入BAO数据集的结果是:$r_{d}=139.5806 \pm 3.8522 \mathrm{Mpc}$、$r_{d}=139.728025 \pm 2.7858 \mathrm{Mpc}$和$r_{d}=139.6001 \pm 2.7441 \mathrm{Mpc}$。这些结果凸显了早期和晚期观测测量之间的明显不一致,类似于 $H_0$ 的紧张关系。一个值得注意的现象是,当我们不包含 R22 先验值时,$r_d$ 的结果往往与普朗克和 SDSS 的结果一致。随后,我们进行了宇宙学测试,并将每个参数化与$\Lambda$CDM范式进行了比较研究。我们的诊断分析表明,所有模型都与幻影区域完美契合。统计分析表明,根据最新的观测测量结果,这两个模型都不能被排除。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Cosmological test of dark energy parametrizations within the framework of Horava-Lifshitz gravity using via Baryon Acoustic Oscillation
We are conducting an investigation to explore late-time cosmic acceleration through various dark energy parametrizations (Wettrich, Efstathiou, and Ma-Jhang) within the Horava-Lifshitz gravity framework. As an alternative to general relativity, this theory introduces anisotropic scaling at ultraviolet scales. Our primary objective is to constrain the key cosmic parameters and the Baryon Acoustic Oscillation (BAO) scale, specifically the sound horizon ($r_{d}$) by utilizing 24 uncorrelated measurements of Baryon Acoustic Oscillations (BAO) derived from recent galaxy surveys, span a redshift range from $z = 0.106$ to $z = 2.33$. Additionally, we integrate the most recent Hubble constant measurement by Riess in 2022 (denoted as R22) as an extra prior. For Wettrich, Efstathiou, and Ma-Jhang, our analysis of Baryon Acoustic Oscillation (BAO) data yields sound horizon results of $r_{d}=148.1560 \pm 2.7688 \mathrm{Mpc}$, $r_{d}=148.6168 \pm 10.2469 \mathrm{Mpc}$, and $r_{d}=147.9737 \pm 10.6096 \mathrm{Mpc}$, respectively. Incorporating the R22 prior into the BAO dataset results in $r_{d}=139.5806 \pm 3.8522 \mathrm{Mpc}$, $r_{d}=139.728025 \pm 2.7858 \mathrm{Mpc}$, and $r_{d}=139.6001 \pm 2.7441 \mathrm{Mpc}$. These outcomes highlight a distinct inconsistency between early and late observational measurements, analogous to the $H_0$ tension. A notable observation is that, when we don't include the R22 prior, the outcomes for $r_d$ tend to be in agreement with Planck and SDSS results. Following this, we conducted the Cosmography test and presented a comparative study of each parametrization with the $\Lambda$CDM paradigm. Our diagnostic analyses demonstrate that all models fit seamlessly within the phantom region. The statistical analysis indicates that neither of the two models can be ruled out based on the latest observational measurements.
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