Zobrazeno 1 - 10
of 89
pro vyhledávání: '"Breton, Nora"'
Publikováno v:
JCAP11(2024)002
We compare light propagation through an intense electromagnetic background as described by three different nonlinear electrodynamics: Born-Infeld (BI), Euler-Heisenberg (EH), and Modified Maxwell (MM). We use the concept of effective metric to determ
Externí odkaz:
http://arxiv.org/abs/2407.21326
Autor:
Galindo-Uriarte, Oscar, Breton, Nora
We present the two exact solutions of the Einstein-Nonlinear electrodynamics equations that generalize the Kerr-Newman solution. We determined the generalized electromagnetic potentials using the alignment between the tetrad vectors of the metric and
Externí odkaz:
http://arxiv.org/abs/2406.17077
Publikováno v:
Phys. Rev. D 110, 064065 (2024)
The energy extraction from an electrostatic black hole by the decay or splitting of electrically charged particles is analyzed. We determine the energetic conditions that make the extraction process viable and present a general expression for the eff
Externí odkaz:
http://arxiv.org/abs/2406.12088
Autor:
Guzman-Herrera, Elda, Breton, Nora
ModMax is a nonlinear electrodynamics theory with the same symmetries as Maxwell electrodynamics. Static spherically symmetric solutions have been derived by coupling ModMax electrodynamics with the Einstein equations, which can represent a black hol
Externí odkaz:
http://arxiv.org/abs/2308.12572
Publikováno v:
Phys. Rev. D 106 (2022) 024056
In this paper the motion of charged and uncharged test particles in the rotating nonlinearly charged black hole is examined. Its asymptotics can be de Sitter or anti-de Sitter, depending on the value of the nonlinear parameter; consequently this BH c
Externí odkaz:
http://arxiv.org/abs/2207.10740
Autor:
Guzman-Herrera, Elda, Breton, Nora
We study the propagation of light in the Born-Infeld (BI) background as seen by an accelerated observer. In a Born-Infeld electromagnetic field, light trajectories are governed by the null geodesics of the effective optical metric. The accelerated ob
Externí odkaz:
http://arxiv.org/abs/2204.09040
Autor:
Bretón, Nora, López, L. A.
Publikováno v:
Phys. Rev. D 104, 024064 (2021)
In this contribution we study the birefringence and the quasinormal modes (QNM) in the eikonal approximation, of the Einstein-Euler-Heisenberg black hole (EEH-BH) . The EEH-BH is an exact solution of the Einstein equations coupled to the Euler-Heisen
Externí odkaz:
http://arxiv.org/abs/2105.12283
Autor:
López, L. A., Bretón, Nora
In this paper we analyze the frequency shifts of the light emitted by particles describing stable circular geodesics around a static black hole immersed in an external magnetic field of arbitrary strength. This system is represented by the Ernst solu
Externí odkaz:
http://arxiv.org/abs/2104.00840
Autor:
Magos, Daniela, Bretón, Nora
We generalize the solution to the Euler-Heisenberg (EH) theory coupled to gravity that represents a nonlinearly charged static black hole (BH) introducing the cosmological constant; the obtained solution is characterized by four parameters: mass $M$,
Externí odkaz:
http://arxiv.org/abs/2009.05904
Autor:
Guzman-Herrera, Elda, Breton, Nora
We derive the Euler-Heisenberg solutions that describe electromagnetic waves propagating through very intense uniform magnetic or electric background, with the effective metric approach. We first explore the case of a magnetic background: as a result
Externí odkaz:
http://arxiv.org/abs/2008.10739