Exact event horizon of a black hole merger

Montero, Marina Martínez

doi:10.1088/0264-9381/33/15/155003

Cited by 26 publications

(65 citation statements)

References 19 publications

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“…These issues will also be explored for other dynamical spacetimes such as, for example, the quasi-spherical Szekeres solutions [45], the extreme-mass ratio limit of a binary black hole merger [46,47,48] and dynamical solutions conformally related to static multi-black hole solutions, such as the Majumdar-Papapetrou (MP) solutions [49,50,51]. In order to investigate the GH conjectures for numerical solutions with analytic initial data [52], or numerical black hole solutions, we must either consider an implementation of a covariant frame formalism for numerical relativity [53] or investigate the possibility that the curvature invariants dictating the expansion of the outgoing and ingoing null vectors can be expressed in terms of SPIs.…”

Section: Summary and Discussionmentioning

confidence: 99%

Geometric horizons in the Kastor-Traschen multi-black-hole solutions

McNutt

Coley

2018

Phys. Rev. D

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We investigate the existence of invariantly defined quasi-local hypersurfaces in the Kastor-Traschen solution containing N charge-equal-tomass black holes. These hypersurfaces are characterized by the vanishing of particular curvature invariants, known as Cartan invariants, which are generated using the frame approach. The Cartan invariants of interest describe the expansion of the outgoing and ingoing null vectors belonging to the invariant null frame arising from the Cartan-Karlhede algorithm. We show that the evolution of the hypersurfaces surrounding the black holes depends on an upper-bound on the total mass for the case of two and three equal mass black holes. We discuss the results in the context of the geometric horizon conjectures.

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Section: Summary and Discussionmentioning

confidence: 99%

Geometric horizons in the Kastor-Traschen multi-black-hole solutions

McNutt

Coley

2018

Phys. Rev. D

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“…The real question however is whether one can obtain a wormhole metric as a result of an astrophysical merger process. There are some simplistic models of mergers which are analytic in nature [80]. These could be viable starting points for understanding whether a wormhole could be created at all in a merger.…”

Section: Discussionmentioning

confidence: 99%

Gravitational waves from quasinormal modes of a class of Lorentzian wormholes

2018

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Quasinormal modes of a two-parameter family of Lorentzian wormhole spacetimes, which arise as solutions in a specific scalar-tensor theory associated with braneworld gravity, are obtained using standard numerical methods. Being solutions in a scalar-tensor theory, these wormholes can exist with matter satisfying the Weak Energy Condition. If one posits that the end-state of stellar-mass binary black hole mergers, of the type observed in GW150914, can be these wormholes, then we show how their properties can be measured from their distinct signatures in the gravitational waves emitted by them as they settle down in the post-merger phase from an initially perturbed state. We propose that their scalar quasinormal modes correspond to the so-called breathing modes, which normally arise in gravitational wave solutions in scalar-tensor theories. We show how the frequency and damping time of these modes depend on the wormhole parameters, including its mass. We derive the mode solutions and use them to determine how one can measure those parameters when these wormholes are the endstate of binary black hole mergers. Specifically, we find that if a breathing mode is observed in LIGO-like detectors with design sensitivity, and has a maximum amplitude equal to that of the tensor mode that was observed of GW150914, then for a range of values of the wormhole parameters, we will be able to discern it from a black hole. If in future observations we are able to confirm the existence of such wormholes, we would, at one go, have some indirect evidence of a modified theory of gravity as well as extra spatial dimensions. * Electronic address: aneesh.

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“…In particular, the energy conditions required by the area theorems might not be satisfied by all of the matter in the system. Indeed, we have already recalled that is the case for the Hawking radiation, which one expects appears 4 Note that some analytical solutions are known in the case of a large mass asymmetry between the two merging black holes [10,11].…”

Section: Merging and Apparent Horizonsmentioning

confidence: 93%

What is the final state of a black hole merger?

Calmet

Casadio

2018

Mod. Phys. Lett. A

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In this short paper we discuss the possibility of testing the nature of astrophysical black holes using the recently observed black hole mergers. We investigate the possibility that a secondary black hole is created in the merger of two astrophysical black holes and discuss potential astrophysical signatures. We point out that black hole mergers are a possible astrophysical mechanism for the creation of quantum black holes with masses close to the Planck mass.

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Exact event horizon of a black hole merger

Cited by 26 publications

References 19 publications

Geometric horizons in the Kastor-Traschen multi-black-hole solutions

Geometric horizons in the Kastor-Traschen multi-black-hole solutions

Gravitational waves from quasinormal modes of a class of Lorentzian wormholes

What is the final state of a black hole merger?

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