Chaplygin gas dominated anisotropic brane world cosmological models

Journal Article · Sun May 15 04:00:00 EDT 2005 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.71.104022· OSTI ID:20709286

Mak, M K; Harko, T ^[1]

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1. Department of Physics, University of Hong Kong, Pok Fu Lam Road, Hong Kong (China)

We present exact solutions of the gravitational field equations in the generalized Randall-Sundrum model for an anisotropic brane with Bianchi type I geometry, with a generalized Chaplygin gas as matter source. The generalized Chaplygin gas, which interpolates between a high density relativistic era and a nonrelativistic matter phase, is a popular dark energy candidate. For a Bianchi type I space-time brane filled with a cosmological fluid obeying the generalized Chaplygin equation of state the general solution of the gravitational field equations can be expressed in an exact parametric form, with the comoving volume taken as parameter. In the limiting cases of a stiff cosmological fluid, with pressure equal to the energy density, and for a pressureless fluid, the solution of the field equations can be expressed in an exact analytical form. The evolution of the scalar field associated to the Chaplygin fluid is also considered and the corresponding potential is obtained. The behavior of the observationally important parameters like shear, anisotropy, and deceleration parameter is considered in detail.

• OSTI ID: 20709286
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 10 Vol. 71; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANISOTROPY
COSMOLOGICAL MODELS
COSMOLOGY
ENERGY DENSITY
EQUATIONS OF STATE
EVOLUTION
EXACT SOLUTIONS
FIELD EQUATIONS
GEOMETRY
GRAVITATIONAL FIELDS
MEMBRANES
NONLUMINOUS MATTER
POTENTIALS
RELATIVISTIC RANGE
SCALAR FIELDS
SPACE-TIME