Singular sources in Demiański–Newman spacetimes

Manko, V. S.; Martín, Jesús Izquierdo; Ruiz, E.

doi:10.1088/0264-9381/23/13/011

Cited by 14 publications

(29 citation statements)

References 22 publications

(61 reference statements)

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“…For example, it explains the gyromagnetic ratio [49,50] of Kerr-Taub-NUT-type spacetimes. Furthermore, not only is it related to the gravitational action [51,52] of the four-dimensional Taub-NUT-type spacetimes, but it also possesses the general feature of angular momentum [37,38,53]. Recently, it was included in Ref.…”

Section: New Charge J N = Mn and Squared-mass Formulamentioning

confidence: 99%

Thermodynamical hairs of the four-dimensional Taub-Newman-Unti-Tamburino spacetimes

2019

Phys. Rev. D

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It is demonstrated that the generic four-dimensional Taub-Newman-Unti-Tamburino (Taub-NUT) spacetimes can be perfectly described in terms of three or four different kinds of thermodynamic hairs: the Komar mass (M ¼ m), the "angular momentum" (J n ¼ mn), the gravitomagnetic charge (N ¼ n), and/or the dual (magnetic) mass (M ¼ n). In other words, the NUT charge is a thermodynamic multihair which means that it simultaneously has both rotation-like and electromagnetic charge-like characteristics; this is in sharp contrast with the previous knowledge that it has only one physical feature, or that it is purely a single solution parameter. To arrive at this novel result, we put forward a simple, systematic way to investigate the consistent thermodynamic first law and Bekenstein-Smarr mass formulas of all fourdimensional spacetimes that contain a nonzero NUT charge, facilitated by first deriving a meaningful Christodoulou-Ruffini-type squared-mass formula. In this way, not only can the elegant Bekenstein-Hawking one-quarter area-entropy relation be naturally restored in the Lorentzian and Euclidian sectors of generic Taub-NUT-type spacetimes without imposing any constraint condition, but also the physical meaning of the NUT parameter as a poly-facet can be completely clarified in the thermodynamic sense for the first time.

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Section: New Charge J N = Mn and Squared-mass Formulamentioning

confidence: 99%

Thermodynamical hairs of the four-dimensional Taub-Newman-Unti-Tamburino spacetimes

2019

Phys. Rev. D

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“…The simplest way to show how (21) can be constructed from the Kerr-NUT solution is to use the expression of the corresponding Ernst potential from Ref. [23] (formulae (3) of [23] with q = b = 0) and the Bonnor representation of the axisymmetric electrostatic problem (equations (2.9) and (2.10) of [14]). Then, after changing a → ia, ν → iν in the Ernst potential E of the Kerr-NUT solution, and also in its complex conjugate expressionĒ, one will arrive at two real potentials X and Y whose product will give precisely the electrostatic Ernst potential E from (21), while the difference of X and Y will give the doubled value of the potential Φ from (21).…”

Section: B Bonnor's Solution: the Electrostatic Analog Of Kerr-nut Smentioning

confidence: 99%

A combined Majumdar–Papapetrou–Bonnor field as extreme limit of the double–Reissner–Nordström solution

2011

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The general extreme limit of the double-Reissner-Nordström solution is worked out in explicit analytical form involving prolate spheroidal coordinates. We name it the combined Majumdar-Papapetrou-Bonnor field to underline the fact that it contains as particular cases the two-body specialization of the well-known Majumdar-Papapetrou solution and Bonnor's three-parameter electrostatic field. To the latter we give a precise physical interpretation as describing a pair of non-rotating extremal black holes with unequal masses and unequal opposite charges kept apart by a strut, the absolute values of charges exceeding the respective (positive) values of masses.

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“…The individual magnetic charges in the five-parameter EMR solution can be eliminated by means of the condition [23,24] …”

Section: The Five-parameter Asymptotically Flat Emr Solution In σmentioning

confidence: 99%

Stationary black diholes

Manko¹,

Rabadán²,

Sanabria-Gómez³

2014

Phys. Rev. D

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In this paper we present and analyze the simplest physically meaningful model for stationary black diholes - a binary configuration of counter-rotating Kerr-Newman black holes endowed with opposite electric charges - elaborated in a physical parametrization on the basis of one of the Ernst-Manko-Ruiz equatorially antisymmetric solutions of the Einstein-Maxwell equations. The model saturates the Gabach-Clement inequality for interacting black holes with struts, and in the absence of rotation it reduces to the Emparan-Teo electric dihole solution. The physical characteristics of each dihole constituent satisfy identically the well-known Smarr's mass formula.Comment: 19 pages, 3 figures; small changes taking into account referee's suggestion

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Singular sources in Demiański–Newman spacetimes

Cited by 14 publications

References 22 publications

Thermodynamical hairs of the four-dimensional Taub-Newman-Unti-Tamburino spacetimes

Thermodynamical hairs of the four-dimensional Taub-Newman-Unti-Tamburino spacetimes

A combined Majumdar–Papapetrou–Bonnor field as extreme limit of the double–Reissner–Nordström solution

Stationary black diholes

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