Cosmology with a Variable Chaplygin Gas

نویسندگان

  • Zong-Kuan Guo
  • Yuan-Zhong Zhang
چکیده

We consider a new generalized Chaplygin gas model that includes the original Chaplygin gas model as a special case. In this model the generalized Chaplygin gas evolves as from dust to quiessence or phantom. We show that the model is consistent with current type Ia supernova data for a broad range of parameters. PACS number(s): 98.80.Es, 98.80.Cq ∗e-mail address: [email protected]

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

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Holographic Dark Energy Scenario and Variable Modified Chaplygin Gas

In this letter, we have considered that the universe is filled with normal matter and variable modified Chaplygin gas. Also we have considered the interaction between normal matter and variable modified Chaplygin gas in FRW universe. Then we have considered a correspondence between the holographic dark energy density and interacting variable modified Chaplygin gas energy density. Then we have r...

متن کامل

Cosmic Walls and Filaments Formation in Modied Chaplygin Gas Cosmology

We want to study the perturbation growth of an initial seed of an ellipsoidal shape in Top-Hat collapse model of the structure formation in the Modied Chaplygin gas cosmology. Considering reasonable values of the constants and the parameters of the model under study, we can show that a very small deviation from spherical symmetry (ellipsoidal geometry) in the initial seed leads to a nal highly ...

متن کامل

Chaplygin Gas Cosmology Predicts Only 'dusty' Universe

We consider a new approach for Chaplygin gas cosmology, in which the relativistic formulation of Chaplygin matter is of crucial importance. Specifically, the dynamical content of this matter induces a generalizd energy conservation principle. Our results show that (for all times) the universe consists of a novel form of matter with dust like density (∼ (volume) −1) and negative pressure, that i...

متن کامل

Evolution of a Schwarzschild Black Hole in Phantom-like Chaplygin gas Cosmologies

In the classical relativistic regime, the accretion of phantom energy onto a black hole reduces the mass of the black hole. In this context, we have investigated the evolution of a Schwarzschild black hole in the standard model of cosmology using the phantom-like modified variable Chaplygin gas and the viscous generalized Chaplygin gas. The corresponding expressions for accretion time scale and...

متن کامل

New Results in Chaplygin Gas Cosmology

We provide a rigorous derivation of the evolution equation in the context of Chaplygin gas cosmology, in which the relativistic formulation of Chaplygin matter is a crucial ingredient. This is in contrast to the existing literature where the non-relativistic form of the Chaplygin equation of state is naively used in the covariant Einsstein equation. Our results show that the Chaplygin model des...

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

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

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2006