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gr-qc2026
Emergent gravity from nonlinear perturbation of spherical accretion with variable adiabatic index
Rohit Ghosh, Souvik Ghose, Biplab Raychaudhuri +2
The main aim of the present work is to demonstrate that the analogue gravity phenomena are not an artifact of linear perturbation, rather gravity-like effects emerge through the no…
gr-qc2018
Time Evolution of Density Parameters for Matter and Dark Energy and their Interaction Term in Brans-Dicke Gravity
Sudipto Roy, Dipika Nandi, Sumana Ghosh +1
In the framework of Brans-Dicke (BD) theory, the first part of the present study determines the time dependence of BD parameter, energy density and equation of state (EoS) paramete…