f(R) gravity
Five Dimensional Cylindrically Symmetric Solutions and Energy Distribution in f(R) Gravity
... modified gravity with negative and positive power curvature unification of inflation and cosmic acceleration and observed that f(R) models containing positive power of R account for ...
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Phantom and Quintessence Fields Coupled to Scalar Curvature in General f(R) Gravity Theory
... of f R ( ) gravity and Phantom and Quintessence fields coupled to scalar ...of f R ( ) ...eral f R ( ) gravity theory with general matter action and its ...general ...
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Testing Some f(R,T) Gravity Models from Energy Conditions
... special R 2 f T gravity, by using the two models proposed in We observe that for some values of the input parameters, for both models, the stabilities of de Sitter solutions and power-law ...
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Super Exponential Expansion for Dark Energy Model with Variable Λ in f (R, T) Gravity
... f R T gravity with quadratic equation state and cosmological ...of f R T ( , ) gravity [10] and solved the surviving field equations satisfying the linearly varying deceleration ...
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Astronomical Tests for Extended Gravity: Possible Constraints on f(R) with Vanishing Cosmological Constant
... massive gravity, where the gravitational interaction carrier (graviton) itself has a nonzero mass, theories with violation of Lorentz invariance (under extreme conditions), or, theories with additional fields or ...
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Bianchi Type I (Kasner form) with wet dark fluid in f(R, T) gravity
... (4) The wet dark fluid has been used as dark energy in the homogeneous, isotropic FRW model by Holman and Naidu[41] . Many Relativists [42- 56] studied cosmological models with WDF in General Relativity and theories of ...
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On the Thermodynamical Black Hole Stability in the Space Time of a Global Monopole in f(R) Gravity
... the gravity theory, the singularity problems in black hole physics and the physics of the early Universe, leading us to the necessity of finding alternative ...with f R ( ) gravities [4] [5] that has ...
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N-Dimensional Bianchi Type-I Cosmological Models in f(R,T) Theory of Gravity
... in f(R,T) theory of ...in f(R,T) theory of ...in f(R,T) theory of gravity using constant deceleration parameter and variation law of Hubble parameter [28] which ...
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Behavior of bulk viscous Bianchi v cosmological model in f(r) theory of gravity
... f gravity have studied by Kiran et ...in f ( R , T ) gravity with the special form of declaration ...in f ( R , T ) ...in f ( R , T ) ...in f ( ...
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Domain Walls Cosmological Model in f (R,T) Theory of Gravity
... The universe is spherically symmetric and the matter distribution in it is on the whole isotropic and homogeneous. But during the early stages of evolution, it is unlikely that it could have had such a smoothed out ...
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Gravitational Wave Polarizations in f (R) Gravity and Scalar-Tensor Theory
... in f (R) gravity with two different ...for f (R) gravity and obtained the plane wave ...both f (R) gravity and Horndeski theory, and that the longitudinal ...
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Bianchi Type-VIo Wet Dark Fluid Cosmological Model with Linearly Varying Deceleration Parameter in f(R,T) Gravity
... , gravity , where R is the Ricci scalar and T the trace of stress energy-momentum tensor in the context of late time accelerating expansion of the universe has been ...
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The post-Newtonian limit of hybrid f(R)-gravity
... The General Relativity (GR) is the universally recognized theory of gravity. It successfully describes a huge range of scales and gravitational regimes. Together with Standard model, they represent two pillars of ...
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Modified f(R) Gravity and Thermodynamics of Time Dependent Wormholes at Event Horizon
... of gravity ( f R ( ) gravity), which can explain the present acceleration without introducing an exotic matter, has received intense ...on f R ( ) gravity is vast, and the ...
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Verification of f(R)-gravity in binary pulsars
... extended gravity models are ...underlies f (R)-gravity [1], [2]. This theory of gravity could allow to explain Dark Energy (DE) and Dark Matter (DM) by changing the geometry of a ...
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Bianchi Type-I (Kasner Form) Cosmological Model in F(R) Theory of Gravity
... Multamaki & Vilja ( [6],[7] ) investigated static spherically symmetric vacuum solutions of the field equations and non-vacuum solutions by taking perfect fluid respectively. Sharif & Shamir [8] studied exact ...
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A Cyclic Cosmological Model Based on the f(ρ) Modified Theory of Gravity
... the f(ρ) modified theory of gravity ...Lagrangian R-f(ρ), can be considered as a cousin of the F(R) theory of gravity with total Lagrangian ...forms f(ρ) to ...
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Bianchi type-III Cosmological Model with Linear Equation of State in f(R) Gravity
... The f (R ) theory of gravity is the generalization of General ...in f (R ) gravity are “Metric Approach”, “Palatine formalism” and “affine f (R ) ...metric-affine ...
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Cosmological Models in f(R,T) Theory of Gravitation
... in f R T ( , ) ...in f R T ( , ) gravity are derived by Rao and Neelima [43, ...in f R T ( , ) theory of gravitation studied by Shri Ram et ...in f R T ( , ) ...
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Exergy of heat flows in exchanger consisting f gravity heat pipes
... ABSTRACT: The paper deals with the analysis of the impact of inlet air temperature on the exergy efficiency and exergy of the losing heat flow and determination of the relation between the exergy and thermal efficiency in an ...
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