336 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Xiamen UniversityCN19 papers
- National University of SingaporeSG9 papers
- University of GdańskPL9 papers
- University of South WalesGB5 papers
- Nanyang Technological UniversitySG4 papers
- Swansea UniversityGB4 papers
- Başkent UniversityTR3 papers
- Brookhaven National LaboratoryUS3 papers
- Indian Institute of Technology RoorkeeIN3 papers
- National University of Sciences and TechnologyPK3 papers
- Rice UniversityUS3 papers
- University of ConnecticutUS3 papers
20 papers · 1 filter
Weyl-type solutions with multipolar scalar fields
Yen-Kheng Lim
A class of solutions in -dimensional Einstein gravity minimally coupled to a massless scalar field is studied, where the spacetime metric is of a generalized Weyl form with $d-2…
Properties of the magnetic universe with positive cosmological constant
Yu-Xuan Toh, Yun-Ten Chin, Ethan Quanrun Wu +1
The properties of the Melvin-type spacetime with a positive cosmological constant in -dimensional Einstein--Maxwell gravity is studied. The solution is parametrised in terms…
Gravitational Lensing by a Dark Compact Object in Modified Gravity and Observational Constraints from Einstein Rings
Nagina Rehman, Zoe C. S. Chan, Mubasher Jamil +1
In this manuscript, we provide a comprehensive study of gravitational lensing by dark compact objects predicted by a Modified Gravity (MOG) based on the Scalar-Vector-Tensor action…
Periodic orbits of neutral test particles in Reissner-Nordström naked singularities
Zoe C S Chan, Yen-Kheng Lim
We conduct studies on Levin's taxonomy of periodic orbits for neutral test particles around a Reissner-Nordström naked singularity. It was known that naked singularities could harb…
Gravitational Lensing and Image Distortion by Buchdahl Inspired Metric in Gravity
Shafia Maryam, Mubasher Jamil, Mustapha Azreg-Aïnou +1
We investigate gravitational lensing by \textit{special} Buchdahl inspired metric with the Buchdahl parameter . In strong deflection limit, we derive the deflection angl…
Energies and angular momenta of periodic Schwarzschild geodesics
Yen-Kheng Lim, Zhi Cheng Yeo
We consider physical parameters of Levin and Perez-Giz's `periodic table of orbits' around the Schwarzschild black hole, where each periodic orbit is classified according to three…
Black hole thermodynamic free energy as -discriminants
Mounir Nisse, Yen-Kheng Lim, Linus Chang
We show that the free energy and temperature of black holes, considered as a thermodynamic system, can be viewed as an -discriminant of an appropriately-define…
Probing Modified Gravity with Entanglement of Microspheres
Ankit Kumar, Yen-Kheng Lim, P. Arumugam +2
While a wide variety of astrophysical and cosmological phenomena suggest the presence of Dark Matter, all evidence remains via its gravitational effect on the known matter. As such…
Generalised Uncertainty Relations from Finite-Accuracy Measurements
Matthew J. Lake, Marek Miller, Ray Ganardi +1
In this short note we show how the Generalised Uncertainty Principle (GUP) and the Extended Uncertainty Principle (EUP), two of the most common generalised uncertainty relations pr…
Motion of charged particles in spacetimes with magnetic fields of spherical and hyperbolic symmetry
Yen-Kheng Lim
The motion of charged particles in spacetimes containing a submanifold of constant positive or negative curvature is considered, with the electromagnetic tensor proportional to the…
Structure of test magnetic fields and charged particle motion around the Hayward spacetime
Ziou Yang, Yen-Kheng Lim
A configuration of a test magnetic field in Hayward spacetime is obtained by solving Maxwell's equation with the Hayward metric as the background. The magnetic field lines show a d…
Solenoid configurations and gravitational free energy of the AdS--Melvin spacetime
Yen-Kheng Lim
In this paper we explore a solenoid configuration involving a magnetic universe solution embedded in an empty Anti-de Sitter (AdS) spacetime. This requires a non-trivial surface cu…
Light-ring pairs from -discriminantal varieties
Yen-Kheng Lim, Mounir Nisse
When geodesic equations are formulated in terms of an effective potential , circular orbits are characterised by . In this paper we consider the case where …
Motion of charged particles around a magnetic black hole/topological star with a compact extra dimension
Yen-Kheng Lim
We study the motion of charged particles in a family of five-dimensional solutions describing either a black hole or topological star with a fifth compact dimension stabilised by a…
Null geodesics in the C-metric with cosmological constant
Yen-Kheng Lim
In this paper we study the motion of photons or massless particles in the C-metric with cosmological constant. The Hamilton--Jacobi equations are known to be completely separable,…
Hypocycloid motion in the Melvin magnetic universe
Yen-Kheng Lim
The trajectory of a charged test particle in the Melvin magnetic universe is shown to take the form of hypocycloids in two different regimes, first of which is the class of perturb…
Orbital mechanics and quasiperiodic oscillation resonances of black holes in Einstein-Æther theory
Mustapha Azreg-Aïnou, Zihang Chen, Bojun Deng +4
In this paper, we study the motion of test particles around two exact charged black-hole solutions in Einstein-Æther theory. Specifically, we first consider the quasi-periodic osci…
Charged dilaton black hole with multiple Liouville potentials and gauge fields
Yen-Kheng Lim
A solution to an Einstein--Maxwell--dilaton-type theory with Liouville potentials and gauge fields is presented, where and are arbitrary integers. This exact soluti…
Electric/magnetic universe with a cosmological constant
Yen-Kheng Lim
A spacetime consisting of parallel electric/magnetic fields held together by its own gravity in the presence of a cosmological constant is derived as a limit of the de Sitter/a…
Field equations and particle motion in covariant emergent gravity
Yen-Kheng Lim, Qing-hai Wang
We derive the full set of field equations based on Hossenfelder's recent covariant formulation of the emergent gravity model, along with perturbative and exact solutions. The exact…