Energy Bounds in $f(R,G)$ Gravity with Anisotropic Background
| Autor: | Ayesha Komal, M. Farasat Shamir |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Physics
Gravity (chemistry) Physics and Astronomy (miscellaneous) 010308 nuclear & particles physics Null (mathematics) FOS: Physical sciences Type (model theory) 01 natural sciences Metric expansion of space Gravitation Jerk General Relativity and Quantum Cosmology Physics - General Physics General Physics (physics.gen-ph) 0103 physical sciences Energy condition Anisotropy 010303 astronomy & astrophysics Mathematical physics |
| DOI: | 10.48550/arxiv.1708.06602 |
| Popis: | This paper investigates the energy bounds in modified Gauss-Bonnet gravity with anisotropic background. Locally rotationally symmetric Bianchi type ${I}$ cosmological model in $f(R,G)$ gravity is considered to meet this aim. Primarily, a general $f(R,G)$ model is used to develop the field equations. In this aspect, we investigate the viability of modified gravitational theory by studying the energy conditions. We take in account four $f(R,G)$ gravity models commonly discussed in the literature. We formulate the inequalities obtained by energy conditions and investigate the viability of the above mentioned models using the Hubble, deceleration, jerk and snap parameters. Graphical analysis shows that for first two $f(R,G)$ gravity models, NEC, WEC and SEC are satisfied under suitable values of anisotropy and model parameters involved. Moreover, SEC is violated for the third and fourth models which predicts the cosmic expansion. Comment: 21 pages, 16 figures, accepted for publication in IJGMMP |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|