Quintessence and cosmic acceleration

Abstract

A cosmological model with perfect fluid and self-interacting quintessence field is considered in the framework of the spatially flat Friedmann-Robertson-Walker (FRW) geometry. By assuming that all physical quantities depend on the volume scale factor of the Universe, the general solution of the gravitational field equations can be expressed in an exact parametric form. The quintessence field is a free parameter. With an appropriate choice of the scalar field a class of exact solutions is obtained, with an exponential type scalar field potential fixed via the gravitational field equations. The general physical behavior of the model is consistent with the recent cosmological scenario favored by supernova Type Ia observations, indicating an accelerated expansion of the Universe.

6 pages, 3 figures, to appear in Int. J. Mod. Phys. D

References in corpus (6)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• Cosmological Imprint of an Energy Component with General Equation of State
• Quintessence, Cosmic Coincidence, and the Cosmological Constant
• Discovery of a Supernova Explosion at Half the Age of the Universe and its Cosmological Implications
• Reconstructing the Cosmic Equation of State from Supernova distances

Cited by in corpus (7)

• Weyl-Cartan-Weitzenböck gravity as a generalization of teleparallel gravity
• Viscous dissipative Chaplygin gas dominated homogenous and isotropic cosmological models
• Coupling Quintessence to Inflation in Supergravity
• The gravitating perfect fluid-scalar field equations: quintessence and tachyonic
• Exact Scalar-Tensor Cosmological Models
• Exact Scalar-Tensor Cosmological Solutions via Noether Symmetry
• Late time acceleration in 3-brane Brans-Dicke cosmology