Applications of the Gauss-Bonnet theorem to gravitational lensing
, 2008 In this geometrical approach to gravitational lensing theory, we apply the Gauss-Bonnet theorem to the optical metric of a lens, modelled as a static, spherically symmetric, perfect non-relativistic fluid, in the weak deflection limit.
Binney J +8 more
core +2 more sources
Physics Letters BIn this article, we study the weak gravitational lensing in the background of regular, static, spherically symmetric black hole solutions of Einstein’s standard general relativity coupled with nonlinear electrodynamics.
Susmita Sarkar +4 more
doaj +2 more sources
Weak deflection angle of Kazakov–Solodukhin black hole in plasma medium using Gauss–Bonnet theorem and its greybody bonding [PDF]
The European Physical Journal Plus, 2021 In this paper, we study light rays in a Kazakov–Solodukhin black hole. To this end, we use the optical geometry of the Kazakov–Solodukhin black hole within the Gauss–Bonnet theorem.
W. Javed, Iqra Hussain, A. Övgün
semanticscholar +2 more sources
Thermodynamic Phase Transition and Joule Thomson Adiabatic Expansion for dS/AdS Bardeen Black Holes with Consistent 4D Gauss-Bonnet Gravity [PDF]
Iranian Journal of Astronomy and Astrophysics, 2022 Instead of the work \cite{1} given by Glaven and Lin in which in according to the Lovelock theorem it is not applicable for all types of 4-dimensional curved spacetimes of Einstein Gauss Bonnet gravity, authors of the work \cite{2} applied breakdown of ...
Hossein Ghaffarnejad +3 more
doaj +1 more source
sesA: A Program for the Analytic Computation of Solvent-Excluded Surface Areas. [PDF]
ChemistryOpensesA is an accurate and robust program for analytic computation of solvent‐excluded surface (SES) area. Its most salient feature is the computation of probe‐probe intersections by exhaustive search. Detailed comparisons with msms, the current de‐facto standard for SES area computation, show that sesA is much superior to msms.
Wang L.
europepmc +2 more sources
Deriving Weak Deflection Angle by Black Holes or Wormholes using Gauss-Bonnet Theorem [PDF]
Turkish Journal of Physics, 2021 In this review, various researches on finding the bending angle of light deflected by a massive gravitating object which regard the Gauss-Bonnet theorem as the premise have been revised.
Yashmitha Kumaran, A. Ovgun
semanticscholar +1 more source
Physics Letters B, 2022 The objective of this paper is to analyze the weak deflection angle of Einstein-Gauss-Bonnet gravity in the presence of plasma medium. To attain our results, we implement the Gibbons and Werner approach and use the Gauss-Bonnet theorem to Einstein ...
Wajiha Javed, Muhammad Aqib, Ali Övgün
doaj +1 more source
Deflection of charged signals in a dipole magnetic field in a Schwarzschild background using the Gauss-Bonnet theorem [PDF]
Physical Review D, 2022 This paper studies the deflection of charged particles in a dipole magnetic field in Schwarzschild spacetime background in the weak field approximation. To calculate the deflection angle, we use Jacobi metric and Gauss-Bonnet theorem.
Zonghai Li, Wei Wang, J. Jia
semanticscholar +1 more source
Thin accretion disk signatures of scalarized black holes in Einstein-scalar-Gauss-Bonnet gravity
Physics Letters B, 2021 Einstein-scalar-Gauss-Bonnet gravity has recently been known to exhibit spontaneous scalarization. In the presence of the Gauss-Bonnet term the no-hair theorem can be evaded and novel black hole solutions with non-trivial scalar fields have been found ...
Mohaddese Heydari-Fard +1 more
doaj +1 more source
Neck-pinching of C P 1 -structures in the PSL 2 C -character variety. [PDF]
J TopolAbstract We characterize a certain neck‐pinching degeneration of (marked) CP1$\mathbb {C}{\rm P}^1$‐structures on a closed oriented surface S$S$ of genus at least two. In a more general setting, we take a path of CP1$\mathbb {C}{\rm P}^1$‐structures Ct(t⩾0)$C_t \nobreakspace (t \geqslant 0)$ on S$S$ that leaves every compact subset in its deformation ...
Baba S.
europepmc +2 more sources