Makale detayı · 2015
Higher order corrections of the extended Chaplygin gas cosmology with varying G and Lambda
The European Physical Journal C
- Yıl
- 2015
- ISSN
1434-6044- Tür
- article
Veri kaynağı ayrımı
- YÖKSİS YÖKSİS makale kaydı
- OpenAlex OpenAlex zenginleştirmesi (özet, atıf, konular)
Özet
İngilizce (OpenAlex)
In this paper, we study two different models of dark energy based on the Chaplygin gas equation of state. The first model is the variable modified Chaplygin gas, while the second one is the extended Chaplygin gas. Both models are considered in the framework of higher order $$f(R)$$ modified gravity. We also consider the case of time-varying gravitational constant $$G$$ and $$\Lambda $$ for both models. We investigate some cosmological parameters such as the Hubble, the deceleration, and the equation of state parameters. Then we show that the model that we consider, the extended Chaplygin gas with time-dependent $$G$$ and $$\Lambda $$ , is consistent with the observational data. Finally we conclude with the discussion of cosmological perturbations of our model.
Konular
- Cosmology and Gravitation Theories
- Black Holes and Theoretical Physics
- Galaxies: Formation, Evolution, Phenomena
Birincil konu Cosmology and Gravitation Theories