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Black holes: The membrane paradigm
TLDR
In this article, the physics of black holes are explored in terms of a membrane paradigm which treats the event horizon as a two-dimensional membrane embedded in three-dimensional space, and a 3+1 formalism is used to split Schwarzschild space-time and the laws of physics outside a nonrotating hole.Abstract:
The physics of black holes is explored in terms of a membrane paradigm which treats the event horizon as a two-dimensional membrane embedded in three-dimensional space. A 3+1 formalism is used to split Schwarzschild space-time and the laws of physics outside a nonrotating hole, which permits treatment of the atmosphere in terms of the physical properties of thin slices. The model is applied to perturbed slowly or rapidly rotating and nonrotating holes, and to quantify the electric and magnetic fields and eddy currents passing through a membrane surface which represents a stretched horizon. Features of tidal gravitational fields in the vicinity of the horizon, quasars and active galalctic nuclei, the alignment of jets perpendicular to accretion disks, and the effects of black holes at the center of ellipsoidal star clusters are investigated. Attention is also given to a black hole in a binary system and the interactions of black holes with matter that is either near or very far from the event horizon. Finally, a statistical mechanics treatment is used to derive a second law of thermodynamics for a perfectly thermal atmosphere of a black hole.read more
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Magnetized Accretion inside the Marginally Stable Orbit around a Black Hole
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The Jet-Disk Connection and Blazar Unification
TL;DR: In this paper, the relation between the power carried by relativistic jets and the nuclear power provided by accretion was discussed for a group of blazars including FSRQs and BL Lac objects.
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Electromagnetic Extraction of Energy from Kerr Black Holes
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The Effective Field Theorist's Approach to Gravitational Dynamics
TL;DR: In this article, effective field theory (EFT) was used for the study of cosmological large-scale structures, focusing on extended objects in long-wavelength backgrounds and gravitational wave emission from spinning binary systems.
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Transport of Large-Scale Poloidal Flux in Black Hole Accretion
TL;DR: In this article, a three-dimensional GRMHD simulation of an accretion torus embedded in a large-scale vertical magnetic field orbiting a Schwarzschild black hole is presented.