Bouncing Cosmology in f G , T Gravity with Logarithmic Trace Term

IF 1.6 4区物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS

Advances in Astronomy Pub Date : 2021-03-02 DOI:10.1155/2021/8852581

M. Shamir

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引用次数: 1

Abstract

This study is devoted to explore bouncing cosmology in the context of f G , T theory of gravity. For this purpose, a Gauss–Bonnet cosmological model with logarithmic trace term is considered. In particular, the possibility of obtaining bouncing solutions by considering two equations of state parameters is investigated. A graphical analysis is provided for analyzing the obtained bouncing solutions. The energy conditions are discussed in detail. It is interesting to notice that null and strong energy conditions are violated near the neighborhood of bouncing points justifying the accelerating universe in the light of the recent observational data. The behavior of the scale factor, red shift function, deceleration parameter, and Hubble parameter is also debated. An important feature of the current study is the discussion of conservation equation in f G , T gravity. The possibility of some suitable constraint equations which recover the standard conservation equation is discussed, and all the free parameters are assumed accordingly. All the results in this study suggest that the proposed f G , T gravity model provides good bouncing solutions with the chosen EoS parameters.

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具有对数迹项的fG，T引力中的反弹宇宙学

本研究致力于在重力G, T理论的背景下探索弹跳宇宙学。为此，考虑了具有对数示踪项的高斯-博内宇宙学模型。特别地，研究了考虑两个状态参数方程得到弹跳解的可能性。对得到的弹跳解进行了图解分析。详细讨论了能量条件。有趣的是，根据最近的观测数据，在弹跳点附近违反了零能量和强能量条件，证明了宇宙的加速。尺度因子、红移函数、减速参数和哈勃参数的行为也有争论。本研究的一个重要特点是讨论了gf, T重力下的守恒方程。讨论了恢复标准守恒方程的合适约束方程的可能性，并对所有的自由参数进行了假设。所有研究结果表明，所提出的f G, T重力模型在所选的EoS参数下提供了良好的弹跳解。

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来源期刊

Advances in Astronomy ASTRONOMY & ASTROPHYSICS-

CiteScore

2.70

自引率

7.10%

发文量

审稿时长

22 weeks

期刊介绍： Advances in Astronomy publishes articles in all areas of astronomy, astrophysics, and cosmology. The journal accepts both observational and theoretical investigations into celestial objects and the wider universe, as well as the reports of new methods and instrumentation for their study.