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8 papers · 2 filters
Scalar-metric quantum cosmology with Chaplygin gas and perfect fluid
Saumya Ghosh, Sunandan Gangopadhyay, Prasanta K. Panigrahi
In this paper we consider the flat FRW cosmology with a scalar field coupled with the metric along with generalized Chaplygin gas and perfect fluid comprising the matter sector. We…
Milne boost from galilean gauge theory
Rabin Banerjee, Pradip Mukherjee
Physical origin of Milne boost invariance of the Newton Cartan spacetime is traced to the effect of local Galilean boosts in its metric structure, using galilean gauge theory. Spec…
Electrovacuum solutions in non-local gravity
Karan Fernandes, Arpita Mitra
We consider the coupling of the electromagnetic field to a non-local gravity theory comprising of the Einstein-Hilbert action in addition to a non-local term as…
Cosmological implications of shift symmetric Galileon field
Rabin Banerjee, Sumanta Chakraborty, Arpita Mitra +1
A ghost-free metric formulation of the recently proposed covariant Galileon model \cite{RPgal} which retains the internal shift symmetry has been constructed. This presents a new r…
Influence of the geometric configuration of accretion flow on the black hole spin dependence of relativistic acoustic geometry
Pratik Tarafdar, Tapas Kumar Das
Linear perturbation of general relativistic accretion of low angular momentum hydrodynamic fluid onto a Kerr black hole leads to the formation of curved acoustic geometry embedded…
Accretion onto a noncommutative inspired Schwarzschild black hole
Biplab Paik, Sunandan Gangopadhyay
In this paper we investigate the problem of ordinary baryonic matter accretion onto the noncommutative geometry inspired Schwarzschild black hole. The fundamental equations governi…