66 citations · 183 across the 12 of their papers we have counts for
12 papers
Light rings and optical appearances of naked singularities, solitons, and black holes in beyond Horndeski gravity
Hyat Huang, Jutta Kunz, Rashmi Uniyal +1
We investigate the geodesic structure and optical appearance of compact objects with primary scalar hair in shift- and parity-symmetric beyond Horndeski gravity. The analytic solut…
Deflection of Light by a Rotating Black Hole Surrounded by "Quintessence"
Prateek Sharma, Hemwati Nandan, Radouane Gannouji +2
We present a detailed analysis of a rotating black hole surrounded by "quintessence". This solution represents a fluid with a constant equation of state, , which can for example…
Bending angle of light in equatorial plane of Kerr-Sen Black Hole
Rashmi Uniyal, Hemwati Nandan, Philippe Jetzer
We study the gravitational lensing by a Kerr-Sen Black Hole arising in heterotic string theory. A closed form expression for the bending angle of light in equatorial plane of Kerr-…
Strong lensing and Observables around 5D Myers-Perry black hole spacetime
Ravi Shankar Kuniyal, Hemwati Nandan, Uma Papnoi +2
We study the motion of massless test particles in a five dimensional (5D) Myers-Perry black hole spacetime with two spin parameters. The behaviour of the effective potential in vie…
Null Geodesics and Red-Blue Shifts of Photons Emitted from Geodesic Particles Around a Non-Commutative Black Hole Spacetime
Ravi Shankar Kuniyal, Rashmi Uniyal, Anindya Biswas +2
We investigate the geodesic motion of massless test particles in the background of a noncommutative geometry inspired Schwarzschild black hole. The behaviour of effective potential…
Null Geodesics and Observables around Kerr-Sen Black Hole
Rashmi Uniyal, Hemwati Nandan K. D. Purohit
We investigate the geodesic motion in the background of Kerr-Sen Black Hole arising in the heterotic string theory. The nature of effective potential is discussed in radial as well…
Geodesic Flows in a Charged Black Hole Spacetime with Quintessence
Hemwati Nandan, Rashmi Uniyal
We investigate the evolution of timelike geodesic congruences, in the background of a charged black hole spacetime surrounded with quintessence. The Raychaudhuri equations for thre…
Null Geodesics in a Magnetically Charged Stringy Black Hole Spacetime
Ravi Shankar Kuniyal, Rashmi Uniyal, Hemwati Nandan +1
We study the geodesic motion of massless test particles in the background of a magnetic charged black hole spacetime in four dimensions in dilaton-Maxwell gravity. The behaviour of…
Geodesic motion in R- charged black hole space-times
Rashmi Uniyal, Anindya Biswas, Hemwati Nandan +1
We study the geodesic motion of massive and massless test particles in the background of a particular class of multiple charge black holes in gauged supergravity theories in D = 4.…
Geodesic flows around charged black holes in two dimensions
Ravi Shankar Kuniyal, Rashmi Uniyal, Hemwati Nandan +1
We study the evolution of timelike geodesics for two dimensional black hole spacetimes arising in string theory and general theory of relativity by solving the Raychaudhuri equatio…
Geodesic Motion in a Charged 2D Stringy Blackhole Spacetime
Rashmi Uniyal, Hemwati Nandan, K. D. Purohit
We study the timelike geodesics and geodesic deviation for a two-dimensional stringy blackhole spacetime in Schwarzschild gauge. We have analyzed the properties of effective potent…
Geodesic Motion in Schwarzschild Spacetime Surrounded by Quintessence
Rashmi Uniyal, N. Chandrachani Devi, Hemwati Nandan +1
We study the time-like geodesic congruences, in the space-time geometry of a Schwarzschild black hole surrounded by quintessence. The nature of effective potential along with the s…