166 citations · 928 across the 27 of their papers we have counts for
30 papers
Wormholes in Vegh--dRGT massive gravity: a null-energy transparency theorem, horizon obstruction, and exact isotropic solutions
Sudan Hansraj, Ayan Banerjee
We study static, spherically symmetric wormholes in deRham--Gabadadze--Tolley massive gravity with the spatially degenerate Vegh reference metric. The effective fluid carried by th…
Conformal flatness selects a universal isothermal attractor in pure Lovelock gravity
Sudan Hansraj
We determine the complete solution set of the conformally flat isotropic pure Lovelock field equations for every order and every admissible dimension . Conformal…
Static anisotropic stars in Lovelock gravity: Universal closed-form equations
Sudan Hansraj
A characteristic-polynomial formulation is already known for static perfect fluids in Lovelock gravity [Phys. Rev. D 113, 084008 (2026)]. We extend it to the complete anisotropic m…
Effective Constrained Scalar--Gauss--Bonnet Inflation Motivated by Gravity
G. G. L. Nashed, Sudan Hansraj, Amare Abebe
We develop an effective framework for inflation in a constrained scalar--Gauss--Bonnet theory motivated by a restricted sector of gravity. Using unified parametr…
Dynamical systems approach to stellar modelling in gravity
Sudan Hansraj, Christian G. Boehmer, Ndumiso Buthelezi
The novel proposal to invoke the split of the Ricci scalar into bulk and boundary terms in the gravitational action, opens up a new avenue of investigation into stellar dynamics. T…
Generating exact polytropes in non-conservative unimodular geometries
Sudan Hansraj, Chevarra Hansraj, Njabulo Mkhize +2
The trace-free Einstein equations contain one equation less than the complete field equations. In a static and spherically symmetric spacetime, the number of field equations is thu…
Is dark energy necessary for the sustainability of traversable wormholes?
Ayan Banerjee, Sudan Hansraj, Anirudh Pradhan +1
In the standard approach to studying wormhole geometry, the presence of dark energy is unavoidable to ensure traversability. The dark energy provides the negative gravity effect to…
The criteria of the anisotropic quark star models in Rastall gravity
Takol Tangphati, Ayan Banerjee, Sudan Hansraj +1
Quark stars are terrestrial laboratories to study fundamental physics at ultrahigh densities and temperatures. In this work, we investigate the internal structure and the physical…
Physical Implications of Pure Lovelock Geometry on Stellar Structure
Ksh. Newton Singh, Megandhren Govender, Sudan Hansraj +1
We construct an exact anisotropic star model with a linear barotropic equation of state and with Finch-Skea potential within the framework of pure Lovelock gravity. A comparison wi…
Gravitationally decoupled strange star model beyond standard maximum mass limit in Einstein-Gauss-Bonnet gravity
S. K. Maurya, Ksh. Newton Singh, M. Govender +1
The recent theoretical advance known as the Minimal Geometric Deformation (MGD) method has initiated a renewed interest in investigating higher curvature gravitational effects in r…
All Conformally Flat Einstein--Gauss--Bonnet static Metrics
Sudan Hansraj, Megandhren Govender, Ayan Banerjee +1
It is known that the standard Schwarzschild interior metric is conformally flat and generates a constant density sphere in any spacetime dimension in Einstein and Einstein--Gauss--…
Isotropic compact stars in 4D Einstein-Gauss-Bonnet gravity
Sudan Hansraj, Ayan Banerjee, Lushen Moodly +1
Recently it has been proposed that the Gauss-Bonnet coupling parameter of Lovelock gravity may suitably be rescaled in order to admit physically viable models of celestial phenomen…
Strange stars in the framework of higher curvature gravity
Sudan Hansraj, Megandhren Govender, Lushen Moodly +1
We study the influence of higher curvature effects on stellar structure and conclude that the properties of stars are greatly impacted when such terms are dynamic. In particular th…
Equilibrium stellar configurations in Rastall theory and linear equation of state
Sudan Hansraj, Ayan Banerjee
Amongst a number of modified theories of gravity, the Rastall theory has been propounded to address some shortcomings of the standard theory of general relativity. Our purpose is t…
Spherically symmetric isothermal fluids in gravity
Sudan Hansraj
We analyze the isothermal property in static fluid spheres within the framework of the modified theory of gravitation. The equation of pressure isotropy of the standard E…
Qualitative analysis of the Tolman metrics within the unimodular framework
Sudan Hansraj, Njabulo Mkhize
We investigate the behaviour of the Tolman metrics within the formalism of the trace-free (or unimodular) gravity. While this approach is similar to the standard Einstein field equ…
Shadow images of Kerr-like wormholes
Muhammed Amir, Kimet Jusufi, Ayan Banerjee +1
Investigations of shadows of astrophysical entities constitute a major source of insight into the evolution of compact objects. Such effects depend on the nature of the compact obj…
Impact of the Rastall parameter on perfect fluid spheres
Sudan Hansraj, Ayan Banerjee, Phongpichit Channuie
We examine the effects of the Rastall parameter on the behaviour of spherically symmetric static distributions of perfect fluid matter. It was claimed by Visser [Physics Letters B,…
Deflection of light by black holes and massless wormholes in massive gravity
Kimet Jusufi, Nayan Sarkar, Farook Rahaman +2
Weak gravitational lensing by black holes and wormholes in the context of massive gravity (Bebronne and Tinyakov 2009) theory is studied. The particular solution examined is charac…
Role of pressure anisotropy on relativistic compact stars
S. K. Maurya, Ayan Banerjee, Sudan Hansraj
We investigate a compact spherically symmetric relativistic body with anisotropic particle pressure profiles. The distribution possesses characteristics relevant to modeling compac…
Expanding, shearing and accelerating isotropic plane symmetric universe with conformal Kasner geometry
Sudan Hansraj, Megandhren Govender, Narenee Mewalal
We construct a model of a universe filled with a perfect fluid with isotropic particle pressure. The anisotropic plane symmetric Kasner spacetime is used as a seed metric and throu…
Inverse square law isothermal property in relativistic charged static distributions
Sudan Hansraj, Nkululeko Qwabe
We analyse the impact of the inverse square law fall-off of the energy density in a charged isotropic spherically symmetric fluid. Initially we impose a linear barotropic equation…
Static trace free Einstein equations and stellar distributions
Sudan Hansraj, Rituparno Goswami, George Ellis +1
We construct models of static spherical distributions of perfect fluid in trace--free Einstein gravity theory. The equations governing the gravitational field are equivalent to the…
Anisotropic stellar models admitting conformal motion
Ayan Banerjee, Sumita Banerjee, Sudan Hansraj +1
We address the problem of finding static and spherically symmetric anisotropic compact stars in general relativity that admit conformal motions. The study is framed in the language…