Schwarzschild spacetime immersed in test nonlinear electromagnetic fields

Bokulić, Ana; Smolić, Ivica

doi:10.1088/1361-6382/ab6390

Cited by 5 publications

(3 citation statements)

References 70 publications

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“…For instance, this type of non-minimal coupling naturally comes as a consequence of the effect of QED vacuum polarization on curved spacetime. We note that in the setting of Schwarzschild spacetime near the horizon one could also expect other effects beyond standard electrodynamics to manifest, such as some non-linear effects [67]. With an aim to study this effect in a setting which is relevant for the astrophysical application, we have considered the case of non-minimal coupling between magnetic fields and gravity on Schwarzschild spacetime in the weak magnetic field limit.…”

Section: Discussionmentioning

confidence: 99%

On the non-minimal coupling of magnetic fields with gravity in Schwarzschild spacetime

Kumar

Pavlović²,

Saveliev

2023

Class. Quantum Grav.

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In this work we study the effects of non-minimal coupling between electromagnetism and gravity, which are motivated by quantum effects such as vacuum polarization. We investigate the modification of both asymptotically dipole and uniform magnetic fields around a Schwarzschild black hole that come as the result of non-minimal coupling. While in both cases the magnetic field gets enhanced or suppressed with respect to the case of minimal coupling, depending on the sign of non-minimal coupling parameter, in the case of a background uniform magnetic field the direction of the magnetic field also alters in the vicinity of the black hole horizon. We have discussed the possible astrophysical and cosmological sources for which the vacuum polarization may be at play, while also discussing the observational effects, in particular the possibility of synchrotron radiation from the vicinity of a black hole. We conclude that such observations could be used to constrain the value of the non-minimal coupling parameter.

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Section: Discussionmentioning

confidence: 99%

On the non-minimal coupling of magnetic fields with gravity in Schwarzschild spacetime

Kumar

Pavlović²,

Saveliev

2023

Class. Quantum Grav.

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“…In this paper, we use perturbative results from Ref. [85] to give the effective metric for photons moving around Schwarzschild black holes immersed in BI uniform magnetic fields. In fact, the first-order perturbative gauge field takes the form…”

Section: Schwarzschild Black Holes Immersed In Bi Uniform Magnetic Fi...mentioning

confidence: 99%

Effects of Born–Infeld electrodynamics on black hole shadows

et al. 2022

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In this work, we study the shadow of Born–Infeld (BI) black holes with magnetic monopoles and Schwarzschild black holes immersed in the BI uniform magnetic field. Illuminated by a celestial sphere, black hole images are obtained by using the backward ray-tracing method. For magnetically charged BI black holes, we find that the shadow radius increases with the increase of nonlinear electromagnetics effects. For Schwarzschild black holes immersed in the BI uniform magnetic field, photons tend to move towards the axis of symmetric, resulting in stretched shadows along the equatorial plane.

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“…Over the years quest for a regular black hole solutions became intertwined with proliferation of new NLE theories based on various Lagrangian functions, such as logarithmic [107], hyperbolic tangent [3], power [58,59], exponential [63] and so on. We note in passing that Wald's solution [118], describing black hole immersed in a homogeneous magnetic field, has been recently perturbatively generalized to NLE theories [14].…”

Section: Introductionmentioning

confidence: 99%

Black hole thermodynamics in the presence of nonlinear electromagnetic fields

Bokulić,

Jurić,

Smolić

2021

Preprint

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As the interaction between the black holes and highly energetic infalling charged matter receives quantum corrections, the basic laws of black hole mechanics have to be carefully rederived. Using the covariant phase space formalism we generalize the first law of black hole mechanics, both "equilibrium state" and "physical process" version, in the presence of nonlinear electrodynamics fields, defined by Lagrangians depending on both quadratic electromagnetic invariants, F ab F ab and F ab ⋆F ab . Derivation of this law demands a specific treatment of the Lagrangian parameters, similar to embedding of the cosmological constant into thermodynamic context. Furthermore, we discuss the validity of energy conditions, several complementing proofs of the zeroth law of black hole electrodynamics and some aspects of the recently generalized Smarr formula, its (non-)linearity and relation to the first law.

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Schwarzschild spacetime immersed in test nonlinear electromagnetic fields

Cited by 5 publications

References 70 publications

On the non-minimal coupling of magnetic fields with gravity in Schwarzschild spacetime

On the non-minimal coupling of magnetic fields with gravity in Schwarzschild spacetime

Effects of Born–Infeld electrodynamics on black hole shadows

Black hole thermodynamics in the presence of nonlinear electromagnetic fields

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