High-energy interactions of charged black holes in full general relativity II: Near-extremal merger remnants and universality with the irreducible mass
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arXiv
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2024
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| author | Smith, M A. M. Paschalidis, Vasileios Bozzola, Gabriele |
| author_facet | Smith, M A. M. Paschalidis, Vasileios Bozzola, Gabriele |
| contents | In a previous paper, arXiv:2411.11960 [gr-qc], we initiated a study of high-energy interactions of charged binary black holes near the scattering threshold, focusing on zoom-whirl orbits. In this second paper in our series, we focus on merger remnant properties and energetics with new simulations of equal-mass, equal-charge, nonspinning binary black holes with variable impact parameter. We find near-extremal merger remnants with Kerr-Newman parameter reaching $Υ_f = 0.97$, and observe that the maximum $Υ_f$ increases monotonically with $λ$ for a fixed initial Lorentz factor. We find that binaries with larger $λ$ radiate less total energy despite having stronger electromagnetic emission. The maximum energy radiated by a binary in our study is $31\%$ of its gravitational mass. Increasing $λ$ has little effect on the maximum angular momentum radiated, which was $\approx 72\%$ of the spacetime total angular momentum for each $λ$ explored here. Lastly, we provide additional evidence for the universality with the irreducible mass that we discovered in arXiv:2411.11960 [gr-qc]. The black hole horizon areal radius determines a fundamental, gauge-invariant length scale governing BH interactions near the scattering threshold. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2412_01881 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | High-energy interactions of charged black holes in full general relativity II: Near-extremal merger remnants and universality with the irreducible mass Smith, M A. M. Paschalidis, Vasileios Bozzola, Gabriele General Relativity and Quantum Cosmology High Energy Physics - Phenomenology High Energy Physics - Theory In a previous paper, arXiv:2411.11960 [gr-qc], we initiated a study of high-energy interactions of charged binary black holes near the scattering threshold, focusing on zoom-whirl orbits. In this second paper in our series, we focus on merger remnant properties and energetics with new simulations of equal-mass, equal-charge, nonspinning binary black holes with variable impact parameter. We find near-extremal merger remnants with Kerr-Newman parameter reaching $Υ_f = 0.97$, and observe that the maximum $Υ_f$ increases monotonically with $λ$ for a fixed initial Lorentz factor. We find that binaries with larger $λ$ radiate less total energy despite having stronger electromagnetic emission. The maximum energy radiated by a binary in our study is $31\%$ of its gravitational mass. Increasing $λ$ has little effect on the maximum angular momentum radiated, which was $\approx 72\%$ of the spacetime total angular momentum for each $λ$ explored here. Lastly, we provide additional evidence for the universality with the irreducible mass that we discovered in arXiv:2411.11960 [gr-qc]. The black hole horizon areal radius determines a fundamental, gauge-invariant length scale governing BH interactions near the scattering threshold. |
| title | High-energy interactions of charged black holes in full general relativity II: Near-extremal merger remnants and universality with the irreducible mass |
| topic | General Relativity and Quantum Cosmology High Energy Physics - Phenomenology High Energy Physics - Theory |
| url | https://arxiv.org/abs/2412.01881 |