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arXiv 2406.04444astro-ph.COgr-qc
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解冻精质标量场模型的观测约束

Observational constraints on thawing quintessence scalar field model

Fereshteh Felegary, Kazuharu Bamba

AI总结:

本文利用多种观测数据和 MCMC 方法,在背景与扰动层面系统比较不同势形式的解冻精质标量场模型与 ΛCDM 模型,指出应寻找与观测数据一致的势形式。

摘要:

通过分析宇宙学参数,并利用包括 H(z)、BAO、CMB、SNIa、BBN 和 f(z)σ8 在内的一组观测数据,在背景和扰动层面上将具有各种势形式的解冻精质标量场模型与 ΛCDM 模型进行了详细比较,以解释晚期宇宙加速。在低红移下,解冻精质标量场模型的宇宙结构增长率显著。利用基于近期膨胀和增长观测数据的标准马尔可夫链蒙特卡洛(MCMC)程序,并结合赤池信息准则和贝叶斯信息准则的统计值,我们讨论了具有不同势形式的解冻精质标量场模型与观测数据的一致性。这项工作的主要结论是,尽管所考虑的各种势形式在文献中非常流行,我们仍应寻找与观测数据一致的势形式。

英文摘要:

Thawing quintessence scalar field models with the various potential forms to explain the late-time cosmic acceleration are compared to the ΛCDM model in detail by analyzing cosmological parameters with a set of observational data including H(z), BAO, CMB, SNIa, BBN, and f(z)σ8 at the background and the perturbation levels. At low redshifts for the thawing quintessence scalar field models, the growth rate of the cosmic structure is significant. By utilizing a standard Markov Chain Monte Carlo (MCMC) procedure based on the recent expansion and the growth observational data with the statistical values of the Akaike and the Bayesian information criteria, we discuss the consistency of the thawing quintessence scalar field models with the set of different potentials with the observational data. The main consequence of this work is that despite the various considered potential forms that are very popular in the literature, we should be looking for consistent potential forms with observational data. Keywords: Thawing Dark Energy, Large Scale Structure, Markov Chain Monte Carlo Method, Observational Constraints, Matter Perturbations.

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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