Collisions of charged black holes

Zilhão, Miguel; Cardoso, Vítor; Herdeiro, Carlos; Lehner, Luis; Sperhake, Ulrich

doi:10.1103/physrevd.85.124062

Cited by 66 publications

(96 citation statements)

References 81 publications

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“…For vector fields, we construct the gauge invariant Newman Penrose scalar [68] (see also, e.g., [69][70][71] for recent applications in numerical simulations).…”

Section: Wave Extraction and Outputmentioning

confidence: 99%

Superradiant instabilities in astrophysical systems

et al. 2013

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Light bosonic degrees of freedom have become a serious candidate for dark matter, which seems to pervade our entire universe. The evolution of these fields around curved spacetimes is poorly understood but is expected to display interesting effects. In particular, the interaction of light bosonic fields with supermassive black holes, key players in most galaxies, could provide colourful examples of superradiance and nonlinear bosenova-like collapse. In turn, the observation of spinning black holes is expected to impose stringent bounds on the mass of putative massive bosonic fields in our universe.Our purpose here is to present a comprehensive study of the evolution of linearized massive scalar and vector fields in the vicinities of rotating black holes. The evolution of generic initial data has a very rich structure, depending on the mass of the field and of the black hole. Quasi-normal ringdown or exponential decay followed by a power-law tail at very late times is a generic feature of massless fields at intermediate times. Massive fields generically show a transition to power-law tails early on. For a certain boson field mass range, the field can become trapped in a potential barrier outside the horizon and transition to a bound state. Because there are a number of such quasi-bound states, the generic outcome is an amplitude modulated sinusoidal, or beating, signal, whose envelope is well described by the two lowest overtones. We believe that the appearance of such beatings has gone unnoticed in the past, and in fact mistaken for exponential growth. The amplitude modulation of the signal depends strongly on the relative excitation of the overtones, which in turn is strongly tied to the bound-state geography.A fine tuning of the initial data allows one to see the evolution of the nearly pure bound state mode which turns unstable for sufficiently large black hole rotation. For the first time we explore massive vector fields in generic BH background which are hard, if not impossible, to separate in the Kerr background. Our results show that spinning BHs are generically strongly unstable against massive vector fields.

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“…For vector fields, we construct the gauge invariant Newman Penrose scalar [68] (see also, e.g., [69][70][71] for recent applications in numerical simulations).…”

Section: Wave Extraction and Outputmentioning

confidence: 99%

Superradiant instabilities in astrophysical systems

et al. 2013

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“…Collisions of BHs with electric charge have been simulated by Zilhão et al [838, 839]. For the special case of BHs with equal charge-to-mass ratio Q/M and initially at rest, constraint-satisfying initial data are available in closed analytic form.…”

Section: Applications Of Numerical Relativitymentioning

confidence: 99%

Exploring New Physics Frontiers Through Numerical Relativity

et al. 2015

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The demand to obtain answers to highly complex problems within strong-field gravity has been met with significant progress in the numerical solution of Einstein’s equations — along with some spectacular results — in various setups.We review techniques for solving Einstein’s equations in generic spacetimes, focusing on fully nonlinear evolutions but also on how to benchmark those results with perturbative approaches. The results address problems in high-energy physics, holography, mathematical physics, fundamental physics, astrophysics and cosmology.

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“…For recent work on the numerical evolution of Einstein-Maxwell initial data the reader is directed to [29][30][31].…”

Section: Jhep03(2015)029mentioning

confidence: 99%

Super-geometrodynamics

Cvetič

Gibbons

Pope

2015

J. High Energ. Phys.

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We present explicit solutions of the time-symmetric initial value constraints, expressed in terms of freely specifiable harmonic functions for examples of supergravity theories, which emerge as effective theories of compactified string theory. These results are a prerequisite for the study of the time-evolution of topologically non-trivial initial data for supergravity theories, thus generalising the "Geometrodynamics" program of EinsteinMaxwell theory to that of supergravity theories. Specifically, we focus on examples of multiple electric Maxwell and scalar fields, and analyse the initial data problem for the general Einstein-Maxwell-Dilaton theory both with one and two Maxwell fields, and the STU model. The solutions are given in terms of up to eight arbitrary harmonic functions in the STU model. As a by-product, in order compare our results with known static solutions, the metric in isotropic coordinates and all the sources of the non-extremal black holes are expressed entirely in terms of harmonic functions. We also comment on generalizations to time-nonsymmetric initial data and their relation to cosmological solutions of gauged so-called fake supergravities with positive cosmological constant.

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Collisions of charged black holes

Cited by 66 publications

References 81 publications

Superradiant instabilities in astrophysical systems

Superradiant instabilities in astrophysical systems

Exploring New Physics Frontiers Through Numerical Relativity

Super-geometrodynamics

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