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arXiv 2412.03065gr-qcastro-ph.CO
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扩展对称挠率理论框架下的 Chebyshev 宇宙学

Chebyshev cosmography in the framework of extended symmetric teleparallel theory

Sai Swagat Mishra, N. S. Kavya, P. K. Sahoo, V. Venkatesha

AI总结:

本文提出用二元第一类 Chebyshev 多项式重构 $f(Q,T)$ 耦合理论,并基于 PANTHEON+SH0ES 数据进行 MCMC 约束,结果与标准宇宙学模型高度一致。

摘要:

宇宙学已被广泛用于利用测量距离约束宇宙的运动学状态。在本工作中,我们提出一种利用二元第一类 Chebyshev 多项式重构耦合理论的新方法,并由此得到 $f(Q,T)$ 理论的函数形式。此外,级数中出现的未知量通过宇宙学参数加以约束。我们得到了以宇宙学参数表示的光度距离显式形式,以便使用 PANTHEON+SH0ES 数据集进行 MCMC 分析。通过距离模数函数,我们观察到所得结果与标准宇宙学模型及数据高度吻合。

英文摘要:

Cosmography has been extensively utilized to constrain the kinematic state of the Universe using measured distances. In this work, we propose a new method to reconstruct coupling theories using the first kind of Chebyshev polynomial for two variables in which the functional form of the $f(Q,T)$ theory has been obtained. Further, the unknowns that appeared in the series are constrained using the cosmographic parameters. We find the explicit form of the luminosity distance in terms of cosmographic parameters to perform MCMC analysis using the PANTHEON+SH0ES data set. Through the distance modulus function, we observe that the result comes out to be an excellent match to the standard cosmological model and data.

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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