Holographic dark energy cosmology with a new coupling function

Autor:	Ryong Gwang Kim, Jik Su Kim
Rok vydání:	2021
Předmět:	Physics Coupling (physics) Coupling parameter Equation of state (cosmology) Quantum electrodynamics Cosmic microwave background Dark energy General Physics and Astronomy Astrophysics::Cosmology and Extragalactic Astrophysics Baryon acoustic oscillations Redshift Cosmology
Zdroj:	Indian Journal of Physics. 96:2541-2546
ISSN:	0974-9845 0973-1458
DOI:	10.1007/s12648-021-02194-y
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::418217f75ddb1afbdfc3d4aa3a10c2b7 https://doi.org/10.1007/s12648-021-02194-y Zobrazit plný text záznamu Full text from SpringerLink