401 citations · 664 across the 27 of their papers we have counts for
28 papers
Higher-Dimensional Slowly Rotating Black Holes in Nonlinear Electrodynamics
Tayebeh Tahamtan
We study slowly rotating, nonlinearly charged black holes in arbitrary spacetime dimension , using a generalized Lense--Thirring ansatz. Working to linear order in the ro…
Bertotti-Robinson and Bonnor-Melvin universes in nonlinear electrodynamics
David Kubiznak, Otakar Svitek, Tayebeh Tahamtan
We review the status of Birkhoff's theorem in the presence of nonlinear electrodynamics (NLE) - extending the analysis to the case without asymptotic flatness. This leads to the Be…
Orbital Motion in Spacetimes Influenced by the Presence of Scalar and Electromagnetic Fields
J. Horák, T. Tahamtan, T. Hale +3
The study investigates orbital motion of test particles near compact objects described by solutions involving massless scalar fields, electromagnetic fields, and nonlinear electrod…
Regularized Conformal Electrodynamics: Novel C-metric in (2+1) Dimensions
David Kubiznak, Otakar Svítek, Tayebeh Tahamtan
Conformal electrodynamics is a particularly interesting example of power Maxwell non-linear electrodynamics, designed to possess conformal symmetry in all dimensions. In this paper…
Well-posed non-vacuum solutions in Robinson--Trautman geometry
T. Tahamtan, D. Flores-Alfonso, O. Svitek
We study nonlinear matter models compatible with radiative Robinson--Trautman spacetimes and analyze their stability and well-posedness. The results lead us to formulate a conjectu…
Solutions and basic properties of regularized Maxwell theory
Tomas Hale, David Kubiznak, Ota Svitek +1
The regularized Maxwell theory is a recently discovered theory of non-linear electrodynamics that admits many important gravitating solutions within the Einstein theory. Namely, it…
Slowly rotating black holes in nonlinear electrodynamics
David Kubiznak, Tayebeh Tahamtan, Otakar Svitek
We show how (at least in principle) one can construct electrically and magnetically charged slowly rotating black hole solutions coupled to non-linear electrodynamics (NLE). Our ge…
On the compatibility of Nonlinear Electrodynamics models with Robinson--Trautman geometry
T. Tahamtan
Robinson--Trautman solutions with Nonlinear Electrodynamics are investigated for both L(F ) and L(F, G) Lagrangians and presence of electric and magnetic charges as well as electro…
Scalar Hairy Black Holes in the presence of Nonlinear Electrodynamics
T. Tahamtan
We study influence of scalar fields on Nonlinear Electrodynamics spacetimes. The investigation is carried out using both test and gravitating scalar fields. After revisiting Einste…
Prospects for Fundamental Physics with LISA
Enrico Barausse, Emanuele Berti, Thomas Hertog +318
In this paper, which is of programmatic rather than quantitative nature, we aim to further delineate and sharpen the future potential of the LISA mission in the area of fundamental…
Emergence of magnetic null points in electro-vacuum magnetospheres of compact objects: The case of a plunging neutron star
Ondřej Kopáček, Tayebeh Tahamtan, Vladimír Karas
Relativistic effects of compact objects onto electromagnetic fields in their vicinity are investigated using the test-field approximation. In particular, we study the possible emer…
Oblique magnetic fields and the role of frame dragging
Vladimir Karas, Ondrej Kopacek, Devaky Kunneriath +1
Magnetic null points can develop near the ergosphere boundary of a rotating black hole by the combined effects of strong gravitational field and the frame-dragging mechanism. The e…
Null Points in the Magnetosphere of a Plunging Neutron Star
Ondřej Kopáček, T. Tahamtan, Vladimír Karas
We explore the structure of a dipole-type vacuum field of a slowly rotating magnetic star near the horizon of a supermassive black hole, where the structure of field lines becomes…
Quantum fate of timelike naked singularity with scalar hair
O. Svitek, T. Tahamtan, A. Zampeli
We study the quantum fate of a naked curvature singularity sourced by a scalar field via several methods and compare the results obtained. The first method relies on relativistic q…
Nonsymmetric Dynamical Thin-Shell Wormhole in Robinson--Trautman Class
O. Svitek, T. Tahamtan
The thin-shell wormhole created using the Darmois-Israel formalism applied to Robinson-Trautman family of spacetimes is presented. The stress energy tensor created on the throat is…
Properties of Robinson--Trautman solution with scalar hair
T. Tahamtan, O. Svitek
An explicit Robinson--Trautman solution with minimally coupled free scalar field was derived and analyzed recently. It was shown that this solution possesses a curvature singularit…
Robinson--Trautman solution with nonlinear electrodynamics
T. Tahamtan, O. Svitek
Explicit Robinson--Trautman solutions with electromagnetic field satisfying nonlinear field equations are derived and analyzed. The solutions are generated from the spherically sym…
Kundt spacetimes minimally coupled to scalar field
T. Tahamtan, O. Svitek
We derive an exact solution belonging to Kundt class of spacetimes both with and without a cosmological constant that are minimally coupled to a free massless scalar field. We show…
Robinson-Trautman solution with scalar hair
T. Tahamtan, O. Svitek
Explicit Robinson-Trautman solution with minimally coupled free scalar field is derived and analyzed. It is shown that this solution contains curvature singularity which is initial…
Ultrarelativistic boost with scalar field
O. Svitek, T. Tahamtan
We present the ultrarelativistic boost of the general global monopole solution which is parametrized by mass and deficit solid angle. The problem is addressed from two different pe…
Resolution of curvature singularities from quantum mechanical and loop perspective
T. Tahamtan, O. Svitek
We analyze the persistence of curvature singularities when analyzed using quantum theory. First, quantum test particles obeying the Klein-Gordon and Chandrasekhar-Dirac equation ar…
Quantum singularities in a model of f(R) Gravity
T. Tahamtan, O. Gurtug
The formation of a naked singularity in a model of f(R) gravity having as source a linear electromagnetic field is considered in view of quantum mechanics. Quantum test fields obey…
Revisiting the charged BTZ metric in nonlinear electrodynamics
S. Habib Mazharimousavi, M. Halilsoy, T. Tahamtan
In contrast to its chargeless version the charged Banados, Taitelboim and Zanelli (BTZ) metric in linear Maxwell electromagnetism is known to be singular at r=0. We show, by employ…
Solutions for f(R) gravity coupled with electromagnetic field
S. Habib Mazharimousavi, M. Halilsoy, T. Tahamtan
In the presence of external, linear / nonlinear electromagnetic fields we integrate f(R) \sim R+2α\surd(R+const.) gravity equations. In contrast to their Einsteinian cousins the ob…