Observational constrained Weyl type f(Q,T) gravity cosmological model and the dynamical system analysis

IF 4.2 3区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS

Astroparticle Physics Pub Date : 2024-07-16 DOI:10.1016/j.astropartphys.2024.103011

Rahul Bhagat, B. Mishra

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引用次数: 0

Abstract

Using the cosmological date sets, the cosmological parameters are constrained in this paper, with well known phantom behavioural Hubble parameter. To understand the dynamics of the Weyl type $f (Q, T)$ gravity, functional form of $f (Q, T)$ has been introduced, where $Q$ and $T$ respectively represents the nonmetricity scalar that depends on the Weyl vector $(Q = - 6 w^{2})$ and trace of energy–momentum tensor. Using the constrained values of the parameters, the other geometrical parameters are analysed and the accelerating behaviour has been shown. The dynamical parameters and energy conditions are also analysed. Further to get the complete evolutionary behaviour of the Universe, the dynamical system analysis has been performed.

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观测约束韦尔型 f(Q,T)

利用宇宙学日期集，本文对宇宙学参数进行了约束，其中包括众所周知的幻影行为哈勃参数。为了理解韦尔型 f(Q,T) 引力的动力学，本文引入了 f(Q,T) 的函数形式，其中 Q 和 T 分别代表取决于韦尔向量（Q=-6w2）和能动量张量迹线的非度量标量。利用这些参数的约束值，对其他几何参数进行了分析，并展示了加速行为。同时还分析了动力学参数和能量条件。此外，为了获得宇宙的完整演化行为，还进行了动力学系统分析。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Astroparticle Physics 地学天文-天文与天体物理

CiteScore

8.00

自引率

2.90%

发文量

审稿时长

79 days

期刊介绍： Astroparticle Physics publishes experimental and theoretical research papers in the interacting fields of Cosmic Ray Physics, Astronomy and Astrophysics, Cosmology and Particle Physics focusing on new developments in the following areas: High-energy cosmic-ray physics and astrophysics; Particle cosmology; Particle astrophysics; Related astrophysics: supernova, AGN, cosmic abundances, dark matter etc.; Gravitational waves; High-energy, VHE and UHE gamma-ray astronomy; High- and low-energy neutrino astronomy; Instrumentation and detector developments related to the above-mentioned fields.

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