New Holographic Dark Energy Model in Brans-Dicke Theory
| Autor: | Syed Asif Ali Shah, Muhammad Sharif, Kazuharu Bamba |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Physics and Astronomy (miscellaneous)
General Mathematics media_common.quotation_subject Dark matter brans-dicke theory dark energy model cosmological parameters Astrophysics::Cosmology and Extragalactic Astrophysics 01 natural sciences Physical cosmology Metric expansion of space Quantum mechanics 0103 physical sciences Brans–Dicke theory Computer Science (miscellaneous) 010303 astronomy & astrophysics media_common Physics 010308 nuclear & particles physics Equation of state (cosmology) lcsh:Mathematics lcsh:QA1-939 Universe Chemistry (miscellaneous) Dark energy Quintessence |
| Zdroj: | Symmetry, Vol 10, Iss 5, p 153 (2018) Symmetry; Volume 10; Issue 5; Pages: 153 |
| ISSN: | 2073-8994 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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