Published December 2018 | Version v1
Journal article

Cosmic evolution in the background of non-minimal coupling in f(R,T,RμνTμν) gravity

  • 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 f(R,T,Q) modified theory (where R is the Ricci Scalar, T is the trace of energy-momentum tensor (EMT) Tuv and Q=RuvTuv is interaction of EMT Tμν and Ricci Tensor Ruv). We formulate modified field equations in the background of flat Friedmann-Lemaître-Robertson-Walker (FLRW) model which is defined as ds2=dt2a(t)2(dx2+dy2+dz2), where a(t) represents the scale factor. In this formalism energy density is found using covariant divergence of modified field equations. ρ 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

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Copyright
Copyright (c) 2018 Springer Nature B.V.