Rotating dilaton black holes

Horne, James H.; Horowitz, Gary T.

doi:10.1103/physrevd.46.1340

Cited by 196 publications

(293 citation statements)

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“…i Ω i J i ) is an invariant under the generating boosts (this is also true for the Kaluza-Klein black holes of [16]). Then, using the result of Myers and Perry for the area of the unboosted case we arrive at (5.20).…”

Section: Conserved Charges Ergosphere and Horizonsmentioning

confidence: 99%

“…In the present work, we generate a family of solutions depending on a mass, D−1 2 angular momenta ( denotes the integer part) and 36 − 2D electrical charges. 16 electrical charges come from the U (1) 16 of the heterotic string in ten dimensions (on a general point on the moduli space of compactifications) and the remaining 2 · (10 − D) electric charges come from the compactified dimensions (any time we compactify a spatial dimension there appears generically two new U (1) gauge fields: the Kaluza-Klein U (1) field comming from the metric G µν and the "winding" U (1) field originating from the antisymmetric tensor field B µν ). These 1 + D−1…”

Section: Introductionmentioning

confidence: 99%

“…This seems to be a general rule common to the solutions constructed using the generating technique, and we have checked that the same coincidence happens for the Kaluza-Klein black holes of [16]. Next, we compute the surface gravity κ of the rotated black-holes.…”

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confidence: 99%

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Electrically charged black-holes for the heterotic string compactified on a (10 - D)-torus

Llatas

1997

Physics Letters B

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We show that the most general stationary electrically charged black-hole solutions of the heterotic string compactified on a (10−D)-torus (where D > 3) can be obtained by using the solution generating transformations of Sen acting on the Myers and Perry metric. The conserved charges labeling these black-hole solutions are the mass, the angular momentum in all allowed commuting planes, and 36 − 2D electric charges. General properties of these black-holes are also studied.

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Section: Conserved Charges Ergosphere and Horizonsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Electrically charged black-holes for the heterotic string compactified on a (10 - D)-torus

Llatas

1997

Physics Letters B

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“…We call it the Kaluza-Klein black hole. We have, however, the approximate solutions of slowly rotating black holes with arbitrary coupling constant, which were found by Horne and Horowitz [4], and by Shiraishi [5].…”

Section: Introductionmentioning

confidence: 99%

Superradiance around rotating dilatonic black holes

Koga

Maeda

1994

Physics Letters B

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We consider a superradiance effect around rotating dilatonic black holes. We analyze two cases: one is an exact solution with the coupling constant α = √ 3, which effective action is reduced from the 5-dimensional Kaluza-Klein theory, and the other is a slowly rotating dilatonic black holes with arbitrary coupling constant. We find that there exists a critical value (α ∼ 1), which is predicted from a superstring model, and the superradiant emission rate with coupling larger than the critical value becomes much higher than the Kerr-Newman case (α = 0) in the maximally charged limit. Consequently, 4-dimensional primordial black holes in higher dimensional unified theories are either rotating but almost neutral or charged but effectively non-rotating.

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“…Since the dilatonic black holes [14,15,16,17,18] obtained from the low energy effective field theory have qualitatively different properties from those in ordinary Einstein gravity, it is necessary and helpful to study the thermal properties of these black holes via the anomalous point of view. In this paper, motivated by RobinsonWilczek's recent viewpoint, we study Hawking radiation from the static, spherically symmetric dilatonic black holes with arbitrary coupling constant, and that from the rotating Kaluza-Klein and Kerr-Sen dilatonic black holes [19] via gauge and gravitational anomalies.…”

Section: Introductionmentioning

confidence: 99%

Erratum: Hawking radiation from dilatonic black holes via anomalies [Phys. Rev. D75, 064029 (2007)]

Wu¹

2007

Phys. Rev. D

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Recently, Hawking radiation from a Schwarzschild-type black hole via gravitational anomaly at the horizon has been derived by Robinson and Wilczek. Their result shows that, in order to demand general coordinate covariance at the quantum level to hold in the effective theory, the flux of the energy momentum tensor required to cancel gravitational anomaly at the horizon of the black hole, is exactly equal to that of (1 + 1)-dimensional blackbody radiation at the Hawking temperature. In this paper, we attempt to apply the analysis to derive Hawking radiation from the event horizons of static, spherically symmetric dilatonic black holes with arbitrarily coupling constant α, and that from the rotating Kaluza-Klein (α = √ 3) as well as the Kerr-Sen (α = 1) black holes via an anomalous point of view. Our results support Robinson-Wilczek's opinion. In addition, the properties of the obtained physical quantities near the extreme limit are qualitatively discussed.

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Rotating dilaton black holes

Abstract: It is shown that an arbitrarily small amount of angular momentum can qualitatively change the properties of extremal charged black holes coupled to a dilaton. In addition, the gyromagnetic ratio of these black holes is computed and an exact rotating black string solution is presented.

Cited by 196 publications

References 24 publications

Electrically charged black-holes for the heterotic string compactified on a (10 - D)-torus

Electrically charged black-holes for the heterotic string compactified on a (10 - D)-torus

Superradiance around rotating dilatonic black holes

Erratum: Hawking radiation from dilatonic black holes via anomalies [Phys. Rev. D75, 064029 (2007)]

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