24 citations · 123 across the 26 of their papers we have counts for
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Charged particles in the background of the Kiselev solution in power-Maxwell electrodynamics
Marina-Aura Dariescu, Ciprian Dariescu, Vitalie Lungu +1
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 ele…
Charged black holes with dark halos
Cristian Stelea, Marina-Aura Dariescu, Ciprian Dariescu
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 solutio…
The Kiselev solution in power-Maxwell electrodynamics
Marina-Aura Dariescu, Ciprian Dariescu, Vitalie Lungu +1
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 wa…
Probing the Ellis-Bronnikov wormhole geometry with a scalar field: clouds, waves and Q-balls
Jose Luis Blázquez-Salcedo, Marina-Aura Dariescu, Ciprian Dariescu +2
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 an…
On the Mannheim--Kazanas Solution
Marina--Aura Dariescu, Ciprian Dariescu
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 de…
New bound of the mass-to-radius ratio for electrically charged stars
Cristian Stelea, Marina-Aura Dariescu, Ciprian Dariescu
Using a general solution-generating technique for electrically charged relativistic stars with spherical symmetry, we derive a new bound on the mass-radius ratio. This compactness…
Charging axially symmetric interior solutions in General Relativity
Cristian Stelea, Marina-Aura Dariescu, Ciprian Dariescu
We present two solution-generating techniques, which are direct generalizations of certain Ehlers-Harrison transformations in the Ernst formalism, while adapted to work in presence…
Heun functions describing bosons and fermions on Melvin's spacetime
Marina-Aura Dariescu, Ciprian Dariescu
Employing a pseudo-orthonormal coordinate-free approach, the solutions to the Klein--Gordon and Dirac equations for particles in Melvin spacetime are derived in terms of Heun's bic…
On magnetized anisotropic stars
Cristian Stelea, Marina-Aura Dariescu, Ciprian Dariescu
We extend a known solution generating technique for isotropic fluids in order to construct more general models of anisotropic stars with poloidal magnetic fields. In particular, we…
Spatially-Flat Robertson-Walker models with combined CDM and stiff matter sources and the corresponding thermodynamics
Marina-Aura Dariescu, Denisa Andreea Mihu, Ciprian Dariescu
In the present paper, we are considering a spatially-flat Friedmann-Robertson-Walker cosmological model, fueled with stiff matter and dust, treated as non-interacting ideal fluid s…
Charged black holes on the Taub-Bolt instanton
Cristian Stelea, Ciprian Dariescu, Marina Aura Dariescu
We construct a new exact solution of the Einstein-Maxwell-Dilaton field equations in five dimensions, which describes a system of two general charged and static black holes sitting…
Approximative Analytic Study of Fermions in Magnetar's Crust; Ultra-relativistic Plane Waves, Heun and Mathieu Solutions and Beyond
Marina--Aura Dariescu, Ciprian Dariescu
Working with a magnetic field periodic along and decaying in time, we deal with the Dirac-type equation characterizing the fermions evolving in magnetar's crust. For ultra-rel…
Static charged double-black rings in five dimensions
Cristian Stelea, Ciprian Dariescu, Marina-Aura Dariescu
Using a solution generating technique based on the symmetries of the dimensionally reduced Lagrangian we derive two exact solutions of the Einstein-Maxwell-Dilaton field equations…
Fermion confinement induced by geometry
C. Romero, J. B. Formiga, C. Dariescu
We consider a five-dimensional model in which fermions are confined in a hypersurface due to an interaction with a purely geometric field. Inspired by the Rubakov-Shaposhnikov fiel…
First-Order Transitions in Charged Boson Nebulae
Ciprian Dariescu, Marina-Aura Dariescu
Using the first-order approximating solutions to the Einstein-Maxwell-Klein-Gordon system of equations for a complex scalar field minimally coupled to a spherically symmetric space…
Evolving Maximally Symmetric Spacetime Bubbles from Spontaneous Z_2-Violation at Electroweak Symmetry Breaking Scale
Ciprian Dariescu
The Einstein-Gordon equations for Friedmann-Robertson-Walker (FRW) geometries in feedback reaction with the quartically self-interacting physical field, arisen from the "inner pari…
Planary Symmetric Static Worlds with Massless Scalar Sources
Ciprian Dariescu
Motivated by the recent wave of investigations on plane domain wall spacetimes with nontrivial topologies, the present paper deals with (probably) the most simple source field conf…