Arbitrarily deformed Kerr-Newman black hole in an external gravitational field

Bretón, Nora; Garcı́a, Alberto; Manko, V. S.; Denisova, T. E.

doi:10.1103/physrevd.57.3382

Cited by 40 publications

(74 citation statements)

References 23 publications

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“…The distortions in these spacetimes are induced by distortions of the asymptotic structure and by similar methods one can also distort both Reissner-Nordström [7,8] and KN [9,10] solutions. Most generally, stationary axisymmetric electrovac spacetimes may be written as Ernst solutions [11] and there are many solution generating techniques that take existing solutions and generate new ones [12].…”

Section: Introductionmentioning

confidence: 99%

Insights from Melvin–Kerr–Newman spacetimes

Booth

Hunt

Palomo-Lozano

et al. 2015

Class. Quantum Grav.

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Abstract. We examine several aspects of black hole horizon physics using the Melvin-Kerr-Newman (MKN) family of spacetimes. Roughly speaking these are black holes immersed in a distorting background magnetic field and unlike the standard Kerr-Newman (KN) family they are not asymptotically flat. As exact solutions with horizons that can be highly distorted relative to KN, they provide a good testbed for ideas about and theorems constraining black hole horizons.We explicitly show that MKN horizons with fixed magnetic field parameter may be uniquely specified by their area, charge and angular momentum and that the charge and angular momentum are bound by horizon area in the same way as for KN. As expected, extremal MKN horizons are geometrically isomorphic to extremal KN horizons and the geometric distortion of near-extremal horizons is constrained by their proximity to extremality. At the other extreme, Melvin-Schwarzschild (MS) solutions may be infinitely distorted, however for intermediate cases any non-zero charge or angular momentum restricts distortions to be finite. These properties are in agreement with known theorems but are seen to be satisfied in interesting and non-trivial ways.

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Section: Introductionmentioning

confidence: 99%

Insights from Melvin–Kerr–Newman spacetimes

Booth

Hunt

Palomo-Lozano

et al. 2015

Class. Quantum Grav.

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“…The Komar integrals [20] then seem to be the best option as they had already proved to be very efficient for treating the black-hole properties in the external gravitational fields [21,22]. In our recent paper [7] we have applied the Komar integrals to the analysis of the mass and angular momentum distributions in the NUT spacetimes; the main result of that paper consists in establishing the unique value of the integration constant entering the expression of ω at which the total angular momentum is a finite quantity and hence is in accordance with the multipole structure.…”

Section: The Ernst Potentials Metric Functions and Bs Multipole Momementioning

confidence: 99%

Singular sources in Demiański–Newman spacetimes

Manko¹,

Martín²,

Ruiz³

2006

Class. Quantum Grav.

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The analysis of singular regions in the NUT solutions carried out in the recent paper (Manko and Ruiz, 2005 Class. Quantum Grav. 22, 3555) is now extended to the Demiański-Newman vacuum and electrovacuum spacetimes. We show that the effect which produces the NUT parameter in a more general situation remains essentially the same as in the purely NUT solutions: it introduces the semiinfinite singularities of infinite angular momenta and positive or negative masses depending on the interrelations between the parameters; the presence of the electromagnetic field additionally endows the singularities with electric and magnetic charges. The exact formulae describing the mass, charges and angular momentum distributions in the Demiański-Newman solutions are obtained and concise general expressions P n = (m + iν)(ia) n , Q n = (q + ib)(ia) n for the entire set of the respective Beig-Simon multipole moments are derived. These moments correspond to a unique choice of the integration constant in the expression of the metric function ω which is different from the original choice made by Demiański and Newman.

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“…Geroch and Hartle [32] studied the most general static vacuum distorted black hole with a regular event horizon in classical general relativity, while the explicit form of the corresponding metric was obtained completely in [35]. Rotating and charged solutions were constructed in [34]- [38], which were further extended to higher dimensions [39]- [41]. Recently, a class of magnetized distorted black holes was obtained, taking into account also the influence of the magnetic field generated by an external source [42].…”

Section: Introductionmentioning

confidence: 99%

Multiple shadows from distorted static black holes

et al. 2018

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We study the local shadow of the Schwarzschild black hole with a quadrupole distortion and the influence of the external gravitational field on the photon dynamics. The external matter sources modify the light ring structure and lead to the appearance of multiple shadow images. In the case of negative quadrupole moments we identify the most prominent mechanism causing multiple shadow formation. Furthermore, we obtain a condition under which this mechanism can be realized. This condition depends on the quadrupole moment, but also on the position of the observer and the celestial sphere.

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Arbitrarily deformed Kerr-Newman black hole in an external gravitational field

Cited by 40 publications

References 23 publications

Insights from Melvin–Kerr–Newman spacetimes

Insights from Melvin–Kerr–Newman spacetimes

Singular sources in Demiański–Newman spacetimes

Multiple shadows from distorted static black holes

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