5k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Birla Institute of Technology and Science, PilaniIN126 papers
- Homi Bhabha National InstituteIN13 papers
- Saha Institute of Nuclear PhysicsIN11 papers
- GLA UniversityIN10 papers
- Centre National de la Recherche ScientifiqueFR8 papers
- University of CoimbraPT8 papers
- Charotar University of Science and TechnologyIN7 papers
- Indian Institute of Science BangaloreIN7 papers
- Indian Institute of Science Education and Research KolkataIN7 papers
- Indian Institute of AstrophysicsIN5 papers
- Massachusetts Institute of TechnologyUS5 papers
- Microsoft Research (India)IN5 papers
35 papers · 1 filter
Structural Properties of Magnetized Neutron Stars under f (R, T ) Gravity Framework
Charul Rathod, M. Mishra, Prasanta Kumar Das
The current work investigates the structural properties of neutron stars in the presence of a strong magnetic field within the framework of f(R,T) modified gravity, where the matte…
Testing the behaviour of exotic matter near wormhole throat in gravity
Payel Sarkar
In this paper, I propose a static wormhole model within modified gravity where . The wormhole solutions have been evolved in four cases: three different shap…
Constructing Viable Interacting Dark Matter and Dark Energy Models: A Dynamical Systems Approach
Ashmita, Kinjal Banerjee, Prasanta Kumar Das
We study the evolution of FLRW cosmological models for two interacting Dark Matter-Dark Energy Models using dynamical system analysis. Since we are interested in late time e…
ESIGMAHM: An Eccentric, Spinning inspiral-merger-ringdown waveform model with Higher Modes for the detection and characterization of binary black holes
Kaushik Paul, Akash Maurya, Quentin Henry +5
We present a time-domain inspiral-merger-ringdowm (IMR) waveform model ESIGMAHM constructed within a framework we named ESIGMA for coalescing binaries of spinning black holes on mo…
Inflationary Cosmology in the Modified Gravity
Ashmita, Payel Sarkar, Prasanta Kumar Das
In this work, we study the inflationary cosmology in modified gravity theory ( is the modified gravity parameter) with three distinct class of inflation pot…
Emergent Cosmology in Models of Nonlinear Electrodynamics
Payel Sarkar, Prasanta Kumar Das
Nonlinear electrodynamics, which acts as a source of gravity Einstein field equations, leads to emergent cosmology, an alternative solution which can avoid Big Bang singularity. In…
Cosmological dynamics of f(R) models in dynamical system analysis
Parth Shah, Gauranga C. Samanta
In this work we try to understand the late time acceleration of the universe by assuming some modification in the geometry of the space and using dynamical system analysis. This te…
Singularity resolution in gravitational collapse
Karim Mosani, Dipanjan Dey, Kaushik Bhattacharya +1
We investigate the unhindered gravitational collapse of a homogeneous scalar field with nonzero potential, a two-dimensional analog of the Mexican hat-shaped Higgs field potential.…
On the visibility of singularities in general relativity and modified gravity theories
Karim Mosani, Dipanjan Dey, Pankaj S. Joshi +3
We investigate the global causal structure of the end state of a spherically symmetric marginally bound Lemaitre-Tolman-Bondi (LTB) \cite{Lemaitre, Tolman, Bondi} collapsing cloud…
Causal Structure of Singularity in non-spherical Gravitational Collapse
Dipanjan Dey, Pankaj S. Joshi, Karim Mosani +1
We investigate here the final state of gravitational collapse of a non-spherical and non-marginally bound dust cloud as modeled by the Szekeres spacetime. We show that a directiona…
Globally visible singularity in an astrophysical setup
Karim Mosani, Dipanjan Dey, Pankaj S. Joshi
The global visibility of a singularity as an end state of the gravitational collapse of a spherically symmetric pressureless cloud is investigated. We show the existence of a non-z…
Post-Newtonian properties of EMRI with Power Law Potential
Chinmay N. Gandevikar, Divyesh N. Solanki, Dipanjan Dey
There are many astrophysical scenarios where extreme mass ratio inspiral (EMRI) binaries can be surrounded by matter distribution. The distribution of mass can affect the dynamical…
Wormhole modeling in gravity with linear trace term
Nisha Godani, Gauranga C. Samanta
Morris and Thorne \cite{morris1} proposed traversable wormholes, hypothetical connecting tools, using the concept of Einstein's general theory of relativity. In this paper, the mod…
Traversable wormholes in gravity with constant and variable redshift functions
Nisha Godani, Gauranga C. Samanta
The present paper is aimed at the study of traversable wormholes in gravity with a viable function defined as , where is sca…
Strong curvature naked singularities in spherically symmetric perfect fluid collapse
Karim Mosani, Dipanjan Dey, Pankaj S. Joshi
We investigate here the locally naked singularity formed due to a spherically symmetric inhomogeneous collapsing cloud having non-zero isotropic pressure, in terms of its strength.…
Global visibility of a strong curvature singularity in nonmarginally bound dust collapse
Karim Mosani, Dipanjan Dey, Pankaj S. Joshi
We investigate here the local versus global visibility of a space-time singularity formed due to the gravitational collapse of a spherically symmetric dust cloud having a non-zero…
Traversable Wormholes in Gravity
Nisha Godani, Gauranga C. Samanta
In this work, the study of traversable wormholes in gravity with the function , where and are arbitrary constants, is taken into account. The shape func…
Physical Parameters for Stable Models
Gauranga C Samanta, Nisha Godani
Nojiri \& Odintsov \cite{noj1} and Hu \& Sawicki \cite{hu} have studied non-linear functions in modified gravity that explain the cosmic acceleration without cosmological constant,…
Validation of Energy Conditions in Wormhole Geometry within Viable Gravity
Gauranga C Samanta, Nisha Godani
In this work, wormholes, tunnel like structures introduced by Morris \& Thorne \cite{Morris95}, are explored within the framework of gravity. Using the shape function $b(r)=…
Wormhole Modeling Supported by Non-Exotic Matter
Gauranga C. Samanta, Nisha Godani
In the present paper, the modelling of traversale wormholes, proposed by Morris \& Thorne \cite{morris1}, is performed within the gravity with particular viable case $f(R)=R…
Non violation of energy conditions in wormholes modelling
Nisha Godani, Gauranga C. Samanta
Morris \& Thorne \cite{morris1} proposed geometrical objects called traversable wormholes that act as bridges in connecting two spacetimes or two different points of the same space…
Stability analysis for cosmological models in gravity using dynamical system analysis
Parth Shah, Gauranga C. Samanta
Modified gravity theories have received increased attention lately to understand the late time acceleration of the universe. This viewpoint essentially modifies the geometric compo…
Dynamics of General Barotropic Stellar Fluid in the Framework of Gravity
Karim Mosani, Gauranga C. Samanta
Gravitational collapse of a spherically symmetric homogeneous perfect barotropic fluid with linear as well as polytropic type Equation of State (EoS) has been investigated in the f…
Gravitational Collapse in General Relativity and in -gravity: A Comparative Study
Artyom V. Astashenok, Karim Mosani, Sergey D. Odintsov +1
We compare the gravitational collapse of homogeneous perfect fluid with various equations of state in the framework of General Relativity and in gravity. We make our calculat…