High energy collisions of black holes numerically revisited

Healy, J.; Ruchlin, Ian; Loustó, C. O.; Zlochower, Yosef

doi:10.1103/physrevd.94.104020

Cited by 32 publications

(41 citation statements)

References 46 publications

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“…This initial data implementation will allow for simulation of extremely boosted and highly spinning orbiting BHBs to explore the corners of the BHB parameter space, in a regime of theoretical and astrophysical interest. The high boost case was recently used in [54] to study the head-on high-energy collision of nonspinning black holes. It also allows for revisiting some of the most interesting spin dynamic effects in BHBs, such as the hangup [12], flip-flops [13,85,86], and large recoils [19,87], as well as extreme BHB collisions [54].…”

Section: Conclusion and Discussionmentioning

confidence: 99%

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Puncture initial data for black-hole binaries with high spins and high boosts

et al. 2017

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We solve the Hamiltonian and momentum constraints of general relativity for two black holes with nearly extremal spins and relativistic boosts in the puncture formalism. We use a non-conformallyflat ansatz with an attenuated superposition of two Lorentz-boosted, conformally Kerr or conformally Schwarzschild 3-metrics and their corresponding extrinsic curvatures. We compare evolutions of these data with the standard Bowen-York conformally flat ansatz (technically limited to intrinsic spins χ = S/M 2 ADM = 0.928 and boosts P/MADM = 0.897), finding, typically, an order of magnitude smaller burst of spurious radiation and agreement with inspiral and merger. As a first case study, we evolve two equal-mass black holes from rest with an initial separation of d = 12M and spins χi = Si/m 2 i = 0.99, compute the waveforms produced by the collision, the energy and angular momentum radiated, and the recoil of the final remnant black hole. We find that the black-hole trajectories curve at close separations, leading to the radiation of angular momentum. We also study orbiting nonspinning and moderate-spin black-hole binaries and compare these with standard Bowen-York data. We find a substantial reduction in the nonphysical initial burst of radiation which leads to cleaner waveforms. Finally, we study the case of orbiting binary black-hole systems with spin magnitude χi = 0.95 in an aligned configuration and compare waveform and final remnant results with those of the SXS Collaboration [1], finding excellent agreement. This represents the first moving punctures evolution of orbiting and spinning black holes exceeding the Bowen-York limit. Finally, we study different choices of the initial lapse and lapse evolution equation in the moving punctures approach to improve the accuracy and efficiency of the simulations.

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Section: Conclusion and Discussionmentioning

confidence: 99%

“…BY binaries are also limited in the maximum boost the BHs can have (P/M ADM = 0.897, see Ref. [53]), while the HiSpID data can be used to boost BH in excess of P/M ADM = 4 [54].…”

Section: Introductionmentioning

confidence: 99%

Puncture initial data for black-hole binaries with high spins and high boosts

et al. 2017

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“…In recent years, important strides have been taken. The twobody problem was solved satisfactorily at a numerical level [1,3], allowing for an understanding of binary BHs, including the violent collision of two BHs at close to the speed of light [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Collapsing shells, critical phenomena, and black hole formation

Cardoso

Rocha

2016

Phys. Rev. D

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We study the gravitational collapse of two thin shells of matter, in asymptotically flat spacetime or constrained to move within a spherical box. We show that this simple two-body system has surprisingly rich dynamics, which includes prompt collapse to a black hole, perpetually oscillating solutions or black hole formation at arbitrarily large times. Collapse is induced by shell crossing and the black hole mass depends sensitively on the number of shell crossings. At certain critical points, the black hole mass exhibits critical behavior, determined by the change in parity (even or odd) of the number of crossings, with or without mass-gap during the transition. Some of the features we observe are reminiscent of confined scalars undergoing "turbulent" dynamics.

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“…Note that the leading order terms in Θ and Φ depend only on θ and φ, which is why we can define C α in terms of θ and φ in (20).…”

Section: B Asymptotic Flatnessmentioning

confidence: 99%

Conformally flat slices of asymptotically flat spacetimes

Duarte

Hilditch

2020

Class. Quantum Grav.

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For mathematical convenience initial data sets in numerical relativity are often taken to be conformally flat. Employing the dual-foliation formalism, we investigate the physical consequences of this assumption. Working within a large class of asymptotically flat spacetimes we show that the ADM linear momentum is governed by the leading Lorentz part of a boost even in the presence of supertranslation-like terms. Following up, we find that in spacetimes that are asymptotically flat, and admit spatial slices with vanishing linear momentum that are sufficiently close to conformal flatness, any boosted slice can not be conformally flat. Consequently there are no conformally flat boosted slices of the Schwarzschild spacetime. This confirms the previously anticipated explanation for the presence of junk-radiation in Brandt-Brügmann puncture data.

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High energy collisions of black holes numerically revisited

Cited by 32 publications

References 46 publications

Puncture initial data for black-hole binaries with high spins and high boosts

Puncture initial data for black-hole binaries with high spins and high boosts

Collapsing shells, critical phenomena, and black hole formation

Conformally flat slices of asymptotically flat spacetimes

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