Cosmic evolution in the background of non-minimal coupling in gravity
Creators
- 1. COMSATS University Islamabad, Department of Mathematics (Pakistan)
Description
In this manuscript, we are interested to address the issue of cosmic expansion in the background of matter-geometry coupling. For this purpose we consider modified theory (where is the Ricci Scalar, is the trace of energy-momentum tensor (EMT) and is interaction of EMT and Ricci Tensor ). We formulate modified field equations in the background of flat Friedmann-Lemaître-Robertson-Walker (FLRW) model which is defined as , where represents the scale factor. In this formalism energy density is found using covariant divergence of modified field equations. involves a contribution from non-minimal matter geometry coupling which helps to study different cosmic eras based on equation of state (EOS). Furthermore, we apply the energy bounds to constrain the model parameters establishing a pathway to discuss the cosmic evolution for best suitable parameters in accordance with recent observations.
Additional details
Identifiers
Publishing Information
- Journal Title
- Astrophysics and Space Science
- Journal Volume
- 363
- Journal Issue
- 12
- Journal Page Range
- p. 1-11
- ISSN
- 0004-640X
- CODEN
- APSSBE
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 51037575
- Subject category
- S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
- Descriptors DEI
- ENERGY DENSITY; ENERGY-MOMENTUM TENSOR; EQUATIONS OF STATE; EXPANSION; FIELD EQUATIONS; GRAVITATION; INTERACTIONS; NONLUMINOUS MATTER; RICCI TENSOR
- Descriptors DEC
- EQUATIONS; MATTER; TENSORS
Optional Information
- Copyright
- Copyright (c) 2018 Springer Nature B.V.