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- St. Xavier's College (Autonomous)30 papers
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6 papers · 1 filter
Thin accretion disks around traversable wormholes
Farook Rahaman, Tuhina Manna, Rajibul Shaikh +3
In this paper, we aim to investigate various physical properties and characteristics of radiation emerging from the surface of accretion disks, in a rotating traversable axially sy…
Evidence for profile changes in PSR J1713+0747 using the uGMRT
Jaikhomba Singha, Mayuresh P Surnis, Bhal Chandra Joshi +29
PSR J1713+0747 is one of the most precisely timed pulsars in the international pulsar timing array experiment. This pulsar showed an abrupt profile shape change between April 16, 2…
Shadows of Lorentzian traversable wormholes
Farook Rahaman, Ksh. Newton Singh, Rajibul Shaikh +2
The prospect of identifying wormholes by investigating the shadows of wormholes constitute a foremost source of insight into the evolution of compact objects and it is one of the e…
Universality and herd immunity threshold : Revisiting the SIR model for COVID-19
Sourav Chowdhury, Suparna Roychowdhury, Indranath Chaudhuri
COVID-19 pandemic has been raging all around the world for almost a year now, as of November 1, 2020. In this paper, we try to analyze the variation of the COVID-19 pandemic in dif…
Propagation of Axial and Polar Gravitational Waves in Kantowski-Sachs Universe
Sucheta Datta, Sarbari Guha
We apply the Regge-Wheeler formalism to study axial and polar gravitational waves in Kantowski-Sachs universe. The background field equations and the linearised perturbation equati…
An Element --Primary to another Element in Multiplicative Lattices
A. V. Bingi
In this paper, we introduce an element --primary to another element in a compactly generated multiplicative lattice and obtain its characterizations. We prove many of its…