Holographic dark energy cosmology with a new coupling function

An interacting holographic dark energy model is investigated by using the recent observations of supernovae, cosmic microwave background radiation, baryonic acoustic oscillations and observed Hubble parameters. In this work, we exchanged the coupling parameter ξ from constant into a varying function...

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Bibliographic Details
Published in:Indian journal of physics 2022-07, Vol.96 (8), p.2541-2546
Main Authors: Kim, Ryong Gwang, Kim, Jik Su
Format: Article
Language:English
Subjects:
Acceleration
Astrophysics and Astroparticles
Background radiation
Cosmic microwave background
Cosmology
Coupling
Dark energy
Deceleration
Equations of state
Holography
Mathematical models
Original Paper
Parameterization
Parameters
Physics
Physics and Astronomy
Red shift
Supernovae
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Summary:An interacting holographic dark energy model is investigated by using the recent observations of supernovae, cosmic microwave background radiation, baryonic acoustic oscillations and observed Hubble parameters. In this work, we exchanged the coupling parameter ξ from constant into a varying function of redshift following the parameterization introduced by Chevallier, Polarski and Linder. The best-fit values of the various parameters determined through chi-square function minimization technique show that non-zero values of the coupling parameter are possible, and the equation of state parameter for dark energy less than -1 is also possible. Then, our model explains properly the transition of deceleration phase of the universe to the acceleration. Besides, our model seems to resolve the cosmic coincidence problem.
ISSN:0973-1458
0974-9845
DOI:10.1007/s12648-021-02194-y