S. Shekh, A. Husain, H. Chaudhary, S. Samdurkar, N. Myrzakulov
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引用次数: 0
摘要
受高能物理的启发,并考虑到标准引力理论是量子理论的低能极限,有人提出了广义相对论的修正[公式:见正文]。本文致力于研究四维修正高斯-波奈引力的宇宙学模型。本文详细给出了四维弗里德曼-罗伯逊-沃克公设的一般场方程。另外,众所周知,哈勃参数[公式:见正文]的测量有助于宇宙学模型参数的推断。我们试图解释用于计算哈勃参数的 MCMC 统计方法。我们利用宇宙纪年数据、Pantheon 的标准烛光 SN Ia 和重子声学振荡来限制[公式:见正文]的结果形式,通过回归方程来获得最佳匹配值。最后,为了研究我们宇宙的晚期动力学,介绍了物理和运动学变量的行为,如减速参数[公式:见正文]、状态探测器参数[公式:见正文]、诊断参数([公式:见正文])、状态方程参数以及能量条件与红移随参数值变化的行为。
Quintessential f(G) gravity with statistically fitting of H(z)
Inspired by high-energy physics and by considering standard gravity theory as the low-energy limit of quantum theory, the modification of general relativity as [Formula: see text] has been proposed. This paper is dedicated to investigating the cosmological model of modified Gauss–Bonnet gravity in four dimensions. General field equations for the four-dimensional Friedmann– Robertson–Walker metric are given in detail. Also, it is well known that Hubble parameter [Formula: see text] measurements are helpful for the inference of cosmological model parameters. We try to explain the MCMC statistical approach used to calculate Hubble’s parameter. The resulting form of [Formula: see text] was limited using Cosmic Chronometric data, Standard Candles SN Ia from Pantheon, and Baryon Acoustic Oscillations to obtain the best match values by using the regression equation. Finally, to examine the late-time dynamics of our Universe, the behavior of physical and kinematic variables like the deceleration parameter [Formula: see text], State-finder parameters [Formula: see text], diagnostic parameter ([Formula: see text]), equation of state parameter as well as the behavior of energy conditions versus redshift with the parameter values are presented.
期刊介绍:
Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance.
Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.