1.1k citations · 2.4k across the 9 of their papers we have counts for
9 papers
Relativistic images of Schwarzschild black hole lensing
K. S. Virbhadra
We model massive dark objects at centers of many galaxies as Schwarzschild black hole lenses and study gravitational lensing by them in detail. We show that the ratio of mass of a…
Time delay and magnification centroid due to gravitational lensing by black holes and naked singularities
K. S. Virbhadra, C. R. Keeton
We model the massive dark object at the center of the Galaxy as a Schwarzschild black hole as well as Janis-Newman-Winicour naked singularities, characterized by the mass and scala…
Schwarzschild black hole lensing
K. S. Virbhadra, George F. R. Ellis
We study strong gravitational lensing due to a Schwarzschild black hole. Apart from the primary and the secondary images we find a sequence of images on both sides of the optic axi…
Naked singularities and Seifert's conjecture
K. S. Virbhadra
It is shown that for a general nonstatic spherically symmetric metric of the Kerr-Schild class several energy-momentum complexes give the same energy distribution as in the Penrose…
Role of the scalar field in gravitational lensing
K. S. Virbhadra, D. Narasimha, S. M. Chitre
A static and circularly symmetric lens characterized by mass and scalar charge parameters is constructed. For the small values of the scalar charge to the mass ratio, the gravitati…
Directional naked singularity in general relativity
K. S. Virbhadra
We consider a static, axially symmetric, and asymptotically flat exact solution of the Einstein vacuum equations, known as the gamma metric. This is characterized by two constant p…