Observational Constraints of Modified Chaplygin Gas in Chern-Simons Gravity

2014 ◽  
Vol 54 (1) ◽  
pp. 22-35 ◽  
Author(s):  
Ujjal Debnath
Keyword(s):  
Chaplygin Gas ◽  
Observational Constraints ◽  
Modified Chaplygin Gas ◽  
Chern Simons

scholarly journals Observational constraints of modified Chaplygin gas in RS II brane

2013 ◽  
Vol 347 (2) ◽  
pp. 423-431 ◽  
Author(s):  
Chayan Ranjit ◽  
Prabir Rudra ◽  
Sujata Kundu
Keyword(s):  
Chaplygin Gas ◽  
Observational Constraints ◽  
Modified Chaplygin Gas

scholarly journals Modified Chaplygin Gas Cosmology

2012 ◽  
Vol 2012 ◽  
pp. 1-12 ◽  
Author(s):  
H. B. Benaoum
Keyword(s):  
Scalar Field ◽  
Cosmological Model ◽  
Chaplygin Gas ◽  
Observational Constraints ◽  
Modified Chaplygin Gas ◽  
Tachyonic Field ◽  
The Relationship

Modified Chaplygin gas as an exotic fluid has been introduced by H. B. Benaoum (2002). Essential features of the modified Chaplygin gas as a cosmological model are discussed. Observational constraints on the parameters of the model have been included. The relationship between the modified Chaplygin gas and a homogeneous minimally coupled scalar field is reevaluated by constructing its self-interacting potential. In addition, we study the role of the tachyonic field in the modified Chaplygin gas cosmological model and the mapping between scalar field and tachyonic field is also considered.

Entropy-corrected new agegraphic dark energy model in the context of Chern–Simons modified gravity

2015 ◽  
Vol 24 (06) ◽  
pp. 1550044
Author(s):  
Ayman A. Aly ◽  
M. Fekry ◽  
H. Mansour
Keyword(s):  
Dark Energy ◽  
Modified Gravity ◽  
Generalized Uncertainty Principle ◽  
Chaplygin Gas ◽  
Modified Chaplygin Gas ◽  
Agegraphic Dark Energy ◽  
New Agegraphic Dark Energy ◽  
Energy Models ◽  
Cs Modified Gravity ◽  
Chern Simons

Within the framework of Chern–Simons (CS) modified gravity, we studied dark energy models. The new agegraphic dark energy (NADE) model, entropy-corrected new agegraphic dark energy (ECNADE) model and NADE model with generalized uncertainty principle (GUP) are investigated. For these models, we studied the evolution of scale factor a, Hubble parameter H and deceleration parameter q. On meantime, we studied the state finder parameters s and r. These models show some similar behavior with modified Chaplygin gas model in some regions, while in other regions some similarity with phantom and quintessence dark energy is noticed.

scholarly journals Dynamical system analysis of FLRW models with Modified Chaplygin gas

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Ali Osman Yılmaz ◽  
Ertan Güdekli
Keyword(s):  
Dynamical System ◽  
Equation Of State ◽  
Energy Density ◽  
System Analysis ◽  
Chaplygin Gas ◽  
Modified Chaplygin Gas ◽  
State Spaces ◽  
The Universe ◽  
Matter Energy ◽  
Far Future

AbstractWe investigate Friedmann–Lamaitre–Robertson–Walker (FLRW) models with modified Chaplygin gas and cosmological constant, using dynamical system methods. We assume $$p=(\gamma -1)\mu -\dfrac{A}{\mu ^\alpha }$$ p = ( γ - 1 ) μ - A μ α as equation of state where $$\mu$$ μ is the matter-energy density, p is the pressure, $$\alpha$$ α is a parameter which can take on values $$0<\alpha \le 1$$ 0 < α ≤ 1 as well as A and $$\gamma$$ γ are positive constants. We draw the state spaces and analyze the nature of the singularity at the beginning, as well as the fate of the universe in the far future. In particular, we address the question whether there is a solution which is stable for all the cases.

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