Observational constraints on the extended Chaplygin gas inflation

Abstract

In this paper, we study extended Chaplygin gas as a candidate for inflation and predict the values of gas parameters for a physically viable cosmological model. The extended Chaplygin gas which proposed recently has n + 2 free parameters. When n = 1, there are three parameters which are corresponding to modified Chaplygin gas. Here we focus on the second order equation of state where n = 2, so we have generally four free parameters. Under some assumptions, we reduced free parameters of the model to the only one parameter and try to fix it using the dimensionless age parameter. Also we check validity of our calculations using recent observations of BICEP2.

The Convergence of Riemann Solutions to the Modified Chaplygin Gas Equations with a Coulomb-Like Friction Term as the Pressure Vanishes

“…In recent years, some researchers made some studies on the thermal equation of state to MCG and found that it could cool down in some constraints of parameters [6]. To know more interesting results related to MCG, the readers are referred to [7][8][9][10][11][12]. If = 0, the system (1) becomes the homogeneous modified Chaplygin gas equations.…”

Effects of thermal fluctuations on the thermodynamics of modified Hayward black hole

“…The Hayward black hole is an example of such a regular black hole as it does not contain a singularity at the center [23,24]. These black holes have been analyzed using various modifications of the Chaplygin gas formalism [25][26][27][28][29][30][31]. The motion of a particle in the background of a Hayward black hole also has been discussed [32].…”

Logarithmic corrected polynomial f(R) inflation mimicking a cosmological constant

“…So, some people proposed dynamical dark energy models such as scalar field models [7][8][9][10][11][12][13][14][15][16]. There are also another class of modified matter models based on exotic fluid so called Chaplygin gas and its extensions [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35], which is indeed a way to unification of dark matter and dark energy. The other class of dynamical dark energy models are based on modification of the general relativity, which is called f (R) or F (R) gravity, where F is a function of the Ricci scalar and f = R + F [36][37][38][39][40].…”