Zobrazeno 1 - 10
of 262
pro vyhledávání: '"Dariescu Ciprian"'
For the static spherically symmetric dilatonic black hole described by the Gibbons-Maeda-Garfinkle-Horowitz-Strominger geometry, we analyze the timelike trajectories for electrically charged test particles. Both cases of an electric black hole and a
Externí odkaz:
http://arxiv.org/abs/2401.17398
In this work we analyze the motion of charged particles in the background of the Kiselev geometry, which is considered here as an exact solution in the context of power-Maxwell electrodynamics. As it is well known, one can use either an electric ansa
Externí odkaz:
http://arxiv.org/abs/2311.11356
Recently, Cardoso et al. constructed an exact solution of Einstein's equations that describes a supermassive black hole immersed into a dark matter halo. In this work use a solution-generating technique, which is a direct generalization of some of th
Externí odkaz:
http://arxiv.org/abs/2309.13651
Autor:
Dariescu Marina-Aura, Dariescu Ciprian
Publikováno v:
Open Physics, Vol 12, Iss 7, Pp 453-459 (2014)
Externí odkaz:
https://doaj.org/article/9f1a5c629533402db42316dc4ee35fcc
Natural brane-confinement from massive Z 2-spontaneously broken Kaluza-Klein excitations in the bulk
Publikováno v:
Open Physics, Vol 7, Iss 4, Pp 690-695 (2009)
Externí odkaz:
https://doaj.org/article/e658607a903c46c0beb302247db9f5cb
In this work we reconsider the solution describing black holes surrounded by a `quintessence'-like fluid. This geometry was introduced by Kiselev in 2003 and its physical source was originally modeled by an anisotropic fluid. We show that the Kiselev
Externí odkaz:
http://arxiv.org/abs/2206.12876
Autor:
Blázquez-Salcedo, Jose Luis, Dariescu, Marina-Aura, Dariescu, Ciprian, Radu, Eugen, Stelea, Cristian
Publikováno v:
Phys. Lett. B 827, 136993 (2022)
The Ellis-Bronnikov solution provides a simple toy model for the study of various aspects of wormhole physics. In this work we solve the Klein-Gordon equation in this background and find an exact solution in terms of Heun's function. This may describ
Externí odkaz:
http://arxiv.org/abs/2204.05244
We are considering the spacetime described by the metric proposed by Mannheim and Kazanas. The effective potential and the circular orbits are discussed. The rotational velocity derived from the geodesics equation agrees with the observed flat galact
Externí odkaz:
http://arxiv.org/abs/2104.11950
By employing a pseudo-orthonormal coordinate-free approach, the Dirac equation for particles in the Kerr--Newman spacetime is separated into its radial and angular parts. In the massless case to which a special attention is given, the general Heun-ty
Externí odkaz:
http://arxiv.org/abs/2102.03850
Employing a pseudo-orthonormal coordinate-free approach we write down the Dirac equation in spacetimes with static generally prolate metrics. As examples, we consider the electrically charged C-metric, the vacuum C-metric, the Reissner-Nordstrom and
Externí odkaz:
http://arxiv.org/abs/1903.03552