A de Sitter Universe is a Cosmological solution of Einstein's field equation of general Relativity which is named after Willem de Sitter. Also we have discussed in mathematics and physics, a de Sitter space or space time, of a sphere in ordinary Euclidean space and Penrose Diagram of De ...
Kaluza-Klein theory of gravitationVariable ΛViscous fluidIn this paper we have investigated Kaluza-Klein type 5–dimensional model of universe with a flat geometry filled with viscous fluid in the presence of variable cosmological term Λ. A non-singular solution leading to a variable deceleration ...
We have investigated an isotropic and homogeneous cosmological model of the universe in f(R,Tϕ) gravity, where Tϕ is the trace of the energy–momentum tensor and R is the Ricci scalar. We developed and presented exact solutions of field equations of the proposed model by taking the par...
Our model interprets the visible universe as a surface of a sphere (or an inside of a sphere shell) with radius 4.46 \\pm 0.06 Gpc and an event horizon, located on that sphere (shell), with size of 14.0 \\pm 0.2 Gpc. The model predicts CMB redshift and time dilatation of Type Ia...
We consider different models of accelerating Universe which describe the current evolution of the Universe. We demonstrate that the generalized Akaike criterion (Bozdogen criterion) distinguishes the very simple standard cosmological model called LCDM (Lamda Cold Dark Matter model...
美[ˌkɒzmə'lɒdʒɪkl] 英[ˌkɒzmə'lɒdʒɪkl] adj.宇宙论的 英汉 adj. 1. 宇宙论的
Modern simulations model dark matter, dark energy and ordinary matter in an expanding space-time starting from well-defined initial conditions. The modelling of ordinary matter is most challenging due to the large array of physical processes affecting this component. Cosmological simulations have also ...
Section 2 summarizes the kinematics and dynamics of the standard Friedmann model of the universe paying special attention to features involving the cosmological constant. Section 3 reviews the observational evidence for cosmological constant, especially the supernova results, constraints from the age of ...
We show that an Einstein frame universe, with cosmological evolution of the ΛCDM model, always corresponds to a bouncing Jordan frame universe governed by a Brans–Dicke theory. On the other hand, quintessence models of dark energy with non-relativistic matter component are shown to be always ...
It has been suggested that the new version of the universe is made of about 74% DE, 4% ordinary matter and about 22% dark matter.The most simplest form of DE is known as cosmological constant [20,21], also called the cold- dark-matter ( CDM) model, which has been successfully ...