Re-Examining Berman’s Parametrization of the Hubble Parameter in the Context of Late-Time Acceleration

In this paper, we have revisited the Berman’s idea of the variation of Hubble parameter. While previously explored in the context of Λ-varying cosmologies, where scale factor variations yield linear universe expansion, this parametrization has undergone extensive scrutiny. Our investigation, however...

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Bibliographic Details
Published inAstrophysics Vol. 67; no. 2; pp. 246 - 265
Main Authors Mishra, K. R., Kumar, R., Pacif, S. K. J.
Format Journal Article
LanguageEnglish
Published New York Springer US 01.08.2024
Springer
Springer Nature B.V
Subjects
Astronomical research
Astronomy
Astrophysics and Astroparticles
Astrophysics and Cosmology
Context
Dark energy
Expanding universe
Graphical representations
Observations and Techniques
Parameterization
Parameters
Physics
Physics and Astronomy
Relativity
Space and time
Space Exploration and Astronautics
Space Sciences (including Extraterrestrial Physics
Universe
India
Hubble parameter
cosmic acceleration
cosmological parametrization
dark energy
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Summary:In this paper, we have revisited the Berman’s idea of the variation of Hubble parameter. While previously explored in the context of Λ-varying cosmologies, where scale factor variations yield linear universe expansion, this parametrization has undergone extensive scrutiny. Our investigation, however, explores into its implications in the context of late-time cosmic acceleration, within the framework of classical general relativity, adopting the Friedmann-Lemaître-Robertson-Walker (FLRW) spacetime as our background metric. Our analysis offers a precise solution to Einstein’s field equations (EFEs) in a model-independent way, affording a thorough assessment of both geometrical and physical model parameters. Additionally, this study supplements its findings with graphical representations of the evolving cosmological parameters across flat, closed, and open universe scenarios, all subject to constraints derived from the model parameters. In synthesizing these results, we shed light on the intricate interplay between cosmic acceleration, dark energy, and the parametrization of the Hubble parameter, thereby providing valuable insights into the fundamental mechanics of our universe.
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ISSN:0571-7256
1573-8191
DOI:10.1007/s10511-024-09831-4