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- W2971815554 abstract "We numerically investigate the threshold of black-hole formation in the gravitational collapse of electromagnetic waves in axisymmetry. We find approximate power-law scaling $rho_{rm max}sim (eta_*-eta)^{-2gamma}$ of the maximum density in the time evolution of near-subcritical data with $gammasimeq 0.145$, where $eta$ is the amplitude of the initial data. We directly observe approximate discrete self-similarity in near-critical time evolutions with a log-scale echoing period of $Deltasimeq 0.55$. The critical solution is approximately the same for two families of initial data, providing some evidence of universality. Neither the discrete self-similarity nor the universality, however, are exact. We speculate that the absence of an exactly discrete self-similarity might be caused by the interplay of electromagnetic and gravitational wave degrees of freedom, or by the presence of higher-order angular multipoles, or both, and discuss implications of our findings for the critical collapse of vacuum gravitational waves." @default.
- W2971815554 created "2019-09-12" @default.
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- W2971815554 date "2019-10-25" @default.
- W2971815554 modified "2023-10-17" @default.
- W2971815554 title "Critical Phenomena in the Gravitational Collapse of Electromagnetic Waves" @default.
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- W2971815554 doi "https://doi.org/10.1103/physrevlett.123.171103" @default.
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