Geodesic motion in Schwarzschild spacetime surrounded by quintessence

R Uniyal, N Chandrachani Devi, H Nandan… - General Relativity and …, 2015 - Springer
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 …

[HTML][HTML] Tidal effects in Schwarzschild black hole in holographic massive gravity

ST Hong, YW Kim, YJ Park - Physics Letters B, 2020 - Elsevier
We investigate tidal effects produced in the spacetime of the Schwarzschild black hole in
holographic massive gravity, which has two additional mass parameters due to massive …

Null geodesics and observables around the Kerr–Sen black hole

R Uniyal, H Nandan, KD Purohit - Classical and Quantum Gravity, 2017 - iopscience.iop.org
We investigate the geodesic motion in the background of the Kerr–Sen black hole arising in
heterotic string theory. The nature of the effective potential is discussed in the radial, as well …

Stability analysis of geodesics and quasinormal modes of a dual stringy black hole via Lyapunov exponents

S Giri, H Nandan - General Relativity and Gravitation, 2021 - Springer
We investigate the stability of both timelike as well as null circular geodesics in the vicinity of
a dual (3+ 1) dimensional stringy black hole (BH) spacetime by using an excellent tool so …

Null geodesics and red–blue shifts of photons emitted from geodesic particles around a noncommutative black hole space–time

RS Kuniyal, R Uniyal, A Biswas, H Nandan… - … Journal of Modern …, 2018 - World Scientific
We investigate the geodesic motion of massless test particles in the background of a
noncommutative geometry-inspired Schwarzschild black hole. The behavior of effective …

Properties of Spherically Symmetric Black Holes in the Generalized Brans–Dicke Modified Gravitational Theory

M Xu, J Lu, S Yang, H Jiang - Entropy, 2023 - mdpi.com
The many problems faced by the theory of general relativity (GR) have always motivated us
to explore the modified theory of GR. Considering the importance of studying the black hole …

Tidal effects in AdS charged torus-like black hole

G Abbas, M Asgher - Modern Physics Letters A, 2022 - World Scientific
In this paper, we analyze the tidal effects of anti-de Sitter charged black holes. The tidal force
components are obtained by Riemann tensor on tetrad basis and geodesic deviation …

Geodesic flows in a charged black hole spacetime with quintessence

H Nandan, R Uniyal - The European Physical Journal C, 2017 - Springer
We investigate the evolution of timelike geodesic congruences, in the background of a
charged black hole spacetime surrounded by quintessence. The Raychaudhuri equations …

Null geodesics in a magnetically charged stringy black hole spacetime

RS Kuniyal, R Uniyal, H Nandan, KD Purohit - General Relativity and …, 2016 - Springer
We study the null geodesics of a four-dimensional magnetic charged black hole spacetime
arising in string theory. The behaviour of effective potential in view of the different values of …

Geodesic motion in -charged black hole spacetimes

R Uniyal, H Nandan, A Biswas, KD Purohit - Physical Review D, 2015 - APS
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. We …