Does Chaplygin gas have salvation?

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Viscous Generalized Chaplygin Gas

Viscous GCG(generalized Chaplygin gas) cosmology is discussed, assuming that there is bulk viscosity in the linear barotropic fluid and GCG. The dynamical analysis indicates that the phase wg = −1 + √ 3γκτg/(γ − √ 3κτγ) is a dynamical attractor and the equation of state of GCG approaches it from either wg > −1 or wg < −1 depending on the choice of its initial cosmic density parameter and the ra...

متن کامل

Chaplygin electron gas model

We provide a new electromagnetic mass model admitting Chaplygin gas equation of state. We investigate three specializations, the first characterized by a vanishing effective pressure, the second provided with a constant effective density and the third is described by a constant effective pressure p0. For these specializations two particular cases are discussed: (1) σe λ 2 = σ0, and (2) σe λ 2 =...

متن کامل

Variable Chaplygin Gas

We consider a variable Chaplygin gas model, which is characterized by an exotic equation of state, P = −A(a)/ρ, where A(a) is a positive function of the scale factor. By assuming a power-law function A(a) we find that the variable Chaplygin gas evolves as from dust to quiessence. We show that the model is consistent with current type Ia supernova data for a broad range of parameters. ∗e-mail ad...

متن کامل

Interacting New Generalized Chaplygin Gas

We have presented a model in which the new generalized Chaplygin gas interacts with matter. We find that there exists a stable scaling solution at late times in the evolution of the universe. Moreover, the phantom crossing scenario is also observed in this model.

متن کامل

Observational Constraints on the Generalized Chaplygin Gas

In this paper we study a quintessence cosmological model in which the dark energy component is considered to be the Generalized Chaplygin Gas and the curvature of the three-geometry is taken into account. Two parameters characterize this sort of fluid, the ν and the α parameters. We use different astronomical data for restricting these parameters. It is shown that the constraint ν . α agrees en...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: The European Physical Journal C

سال: 2013

ISSN: 1434-6044,1434-6052

DOI: 10.1140/epjc/s10052-013-2357-2