Dark-energy cosmological models in f(G) gravity

Journal Article · Sat Oct 15 00:00:00 EDT 2016 · Journal of Experimental and Theoretical Physics

DOI:https://doi.org/10.1134/S1063776116110182· OSTI ID:22617168

Shamir, M. F., E-mail: [e-mail] ^[1]

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1. National University of Computer and Emerging Sciences Lahore Campus, Department of Sciences and Humanities (Pakistan)

We discuss dark-energy cosmological models in f(G) gravity. For this purpose, a locally rotationally symmetric Bianchi type I cosmological model is considered. First, exact solutions with a well-known form of the f(G) model are explored. One general solution is discussed using a power-law f(G) gravity model and physical quantities are calculated. In particular, Kasner’s universe is recovered and the corresponding f(G) gravity models are reported. Second, the energy conditions for the model under consideration are discussed using graphical analysis. It is concluded that solutions with f(G) = G{sup 5/6} support expansion of universe while those with f(G) = G{sup 1/2} do not favor the current expansion.

• OSTI ID: 22617168
• Journal Information: Journal of Experimental and Theoretical Physics, Vol. 123, Issue 4; Other Information: Copyright (c) 2016 Pleiades Publishing, Inc.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7761
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
COSMOLOGICAL MODELS
EXACT SOLUTIONS
EXPANSION
GRAVITATION
NONLUMINOUS MATTER
RELATIVISTIC RANGE
SYMMETRY
UNIVERSE