New Holographic Dark Energy Model in Brans-Dicke Theory

We study the cosmic evolution of the Bianchi type I universe by using new holographic dark energy model in the context of the Brans-Dicke theory for both non-interacting and interacting cases between dark energy and dark matter. We evaluate the equation of state for dark energy ω D and draw the ω D...

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Bibliographic Details
Published in:Symmetry (Basel) 2018-05, Vol.10 (5), p.153
Main Authors: Sharif, M., Asif Ali Shah, Syed, Bamba, Kazuharu
Format: Article
Language:English
Subjects:
brans-dicke theory
cosmological parameters
Dark energy
dark energy model
Dark matter
Diagnostic software
Diagnostic systems
Equations of state
Quintessence (cosmology)
Stability analysis
Universe
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Summary:We study the cosmic evolution of the Bianchi type I universe by using new holographic dark energy model in the context of the Brans-Dicke theory for both non-interacting and interacting cases between dark energy and dark matter. We evaluate the equation of state for dark energy ω D and draw the ω D − ω ˙ D plane, where the dot denotes the time derivative. It is found that a stage in which the cosmic expansion is accelerating can be realized in both cases. In addition, we investigate the stability of the model by analyzing the sound speed. As a result, it is demonstrated that for both cases, the behavior of the sound speed becomes unstable. Furthermore, with the Om-diagnostic tool, it is shown that the quintessence region of the universe can exist.
ISSN:2073-8994
2073-8994
DOI:10.3390/sym10050153