Note on dark energy and cosmic transit in a scale-invariance cosmology

Author:

Ahmed Nasr12ORCID,Kamel Tarek M.2

Affiliation:

1. Mathematics Department, Faculty of Science, Taibah University, Saudi Arabia

2. Astronomy Department, National Research Institute of Astronomy and Geophysics, Helwan, Cairo, Egypt

Abstract

In general, the laws of physics are not invariant under a change of scale. To find out whether the “scale-invariance hypothesis” corresponds to nature or not, a careful examination to its implications is required. As a consequence, the scale-invariance cosmological models need to be carefully checked with many tests in order to confirm or disconfirm them. In this paper, three different toy models have been introduced in the framework of a scale-invariance cosmology to examine dark energy and cosmic transit. Although cosmic transit exists in the three models, the pressure stays always negative during cosmic evolution. In addition, there is always a singularity in the evolution of the equation of state parameter which is not suitable for a complete investigation of dark energy evolution. The undesirable features of the parameters have been discussed, and a comparison with other cosmological contexts has been done.

Publisher

World Scientific Pub Co Pte Lt

Subject

Physics and Astronomy (miscellaneous)

Cited by 2 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Time evolution of an anisotropic universe under Kaluza-Klein framework with a dynamical cosmological constant;International Journal of Mathematics and Physics;2023-12

2. Some cosmological features of 4D Gauss–Bonnet gravity with varying cosmological constant;International Journal of Geometric Methods in Modern Physics;2022-11-25

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