A study of pilgrim dark energy model in Brans–Dicke theory
| Autor: | Muhammad Sharif, Syed Asif Ali Shah |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Physics
Nuclear and High Energy Physics 010308 nuclear & particles physics Event horizon Dark matter General Physics and Astronomy Astronomy and Astrophysics 01 natural sciences Cosmology Theoretical physics symbols.namesake Friedmann–Lemaître–Robertson–Walker metric 0103 physical sciences Brans–Dicke theory Dark energy symbols 010303 astronomy & astrophysics |
| Zdroj: | Modern Physics Letters A. 34:1950083 |
| ISSN: | 1793-6632 0217-7323 |
| Popis: | In this paper, we study the behavior of non-interacting and interacting pilgrim dark energy (DE) for non-flat FRW model in Brans–Dicke (BD) theory. We consider the future event horizon as well as logarithmic form of BD scalar field [Formula: see text], where [Formula: see text], [Formula: see text] and [Formula: see text] is the scale factor. We evaluate some well-known cosmological parameters such as equation of state as well as deceleration parameter and [Formula: see text] plane as well as statefinder parameters. We discuss graphical behavior of these parameters through pilgrim DE parameter [Formula: see text] for both non-interacting as well as interacting case with interacting parameter [Formula: see text]. It is found that the equation of state parameter gives consistent results with the current cosmic behavior while the deceleration parameter represents transition from decelerated to accelerated phase. The cosmological planes represent different DE regions. Finally, we discuss stability of the model through squared speed of sound in both cases. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|