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- M. Akmullah Bashkir State Pedagogical UniversityRU28 papers
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9 papers · 1 filter
Light bending in the galactic halo by Rindler-Ishak method
Amrita Bhattacharya, Ruslan Isaev, Massimo Scalia +2
After the work of Rindler and Ishak, it is now well established that the bending of light is influenced by the cosmological constant Λ appearing in the Schwarzschild-de Sitter spac…
Relativistic Thermodynamics with an Invariant Energy Scale
Sudipta Das, Subir Ghosh, Dibakar Roychowdhury
A particular framework for Quantum Gravity is the Doubly Special Relativity (DSR) formalism that introduces a new observer independent scale, the Planck energy. Our aim in this pap…
Remarks On The Spherical Scalar Field Halo In Galaxies
Kamal K. Nandi, Ildar Valitov, Nail G. Migranov
Matos, Guzman and Nunez proposed a model for the galactic halo within the framework of scalar field theory. We argue that an analysis involving the full metric can reveal the true…
Brans wormholes
Kamal K. Nandi, Anwarul Islam
It is shown that three of the four Brans solutions of classes I--IV admit wormhole geometry. Two-way traversable wormholes in the Brans-Dicke theory are allowed not only for the ne…
Brans-Dicke wormholes in the Jordan and Einstein frames
K. K. Nandi, B. Bhattacharjee, S. M. K. Alam +1
We examine the possibility of static wormhole solutions in the vacuum Brans-Dicke theory both in the original (Jordan) frame and in the conformally rescaled (Einstein) frame. It tu…
On the optical-mechanical analogy in general relativity
Kamal K. Nandi, Anwarul Islam
We demonstrate that the Evans-Rosenquist formulation of the optical mechanical analogy, so successful in the application to classical problems, also describes the motion of massles…