First fully relativistic calculation of gravitational wave scattering and oscillation modes of viscous stars: viscosity absorbs high-frequency waves, and maximally viscous, near-maximum-compactness stars mimic black hole absorption.
Review: Accretion Disk Theory
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abstract
In this paper I review and discuss the basic concepts of accretion disks, focused especially on the case of accretion disks around black holes. The well known alpha-model is revisited, showing the strengths and weaknesses of the model. Other turbulent viscosity prescription, based on the Reynolds number, that may improve our understanding of the accretion paradigm is discussed. A simple but efficient mathematical model of a self-gravitating accretion disk, as well as observational evidence of these objects, are also included.
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gr-qc 1years
2024 1verdicts
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The dynamical response of viscous objects to gravitational waves
First fully relativistic calculation of gravitational wave scattering and oscillation modes of viscous stars: viscosity absorbs high-frequency waves, and maximally viscous, near-maximum-compactness stars mimic black hole absorption.