Ibrar Hussain

Noether gauge symmetry approach in f(R) gravity

We discuss the f(R) gravity model in which the origin of dark energy is identified as a modification of gravity. The Noether symmetry with gauge term is investigated for the f(R) cosmological model. By utilization of the Noether Gauge Symmetry (NGS) approach, we obtain two exact forms f(R) for which such symmetries exist. Further it is shown that these forms of f(R) are stable.

Cosmic evolution in Brans-Dicke chameleon cosmology

Abstract.We have investigated the Brans-Dicke chameleon theory of gravity and obtained exact solutions of the scale factor a(t) , the scalar field

Approximate Noether symmetries of the geodesic equations for the charged-Kerr spacetime and rescaling of energy

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Accretion of Phantom Energy and Generalized Second Law of Thermodynamics for Einstein-Maxwell-Gauss-Bonnet Black Hole

(t) , an arbitrary function f (

Generalized second law of thermodynamics for FRW cosmology with power-law entropy correction

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Dynamics of a charged particle around a slowly rotating Kerr black hole immersed in magnetic field

) which interact with the matter Lagrangian in the action of the Brans-Dicke chameleon theory and the potential V(

Thermodynamics of phantom energy in the presence of a Reissner-Nordstrom black hole

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A Slowly Rotating Black Hole in Horava-Lifshitz Gravity and a 3+1 Dimensional Topological Black Hole: Motion of Particles and BSW Mechanism

) for different epochs of the cosmic evolution. We plot the functions a(t) ,

Marginally stable circular orbits in the Schwarzschild black hole surrounded by quintessence matter

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Effect of a quintessence model on the energy of the Reissner–Nordstrom black hole

(t) , f (t) and V(