J
2015
Ringed accretion disks: equilibrium configurations
PUGLIESE, Daniela and Zdeněk STUCHLÍK
Basic information
Original name
Ringed accretion disks: equilibrium configurations
Edition
The Astrophysical Journal Supplement Series, GB - Spojené království Velké Británie a, 2015, 0067-0049
Other information
Type of outcome
Článek v odborném periodiku
Field of Study
10308 Astronomy
Confidentiality degree
není předmětem státního či obchodního tajemství
Organization unit
Faculty of Philosophy and Science in Opava
Keywords in English
accretion; black hole physics; hydrodynamics; accretion disks
Tags
International impact, Reviewed
Links
GB14-37086G, research and development project.
V originále
We investigate a model of a ringed accretion disk, made up by several rings rotating around a supermassive Kerr black hole attractor. Each toroid of the ringed disk is governed by the general relativity hydrodynamic Boyer condition of equilibrium configurations of rotating perfect fluids. Properties of the tori can then be determined by an appropriately defined effective potential reflecting the background Kerr geometry and the centrifugal effects. The ringed disks could be created in various regimes during the evolution of matter configurations around supermassive black holes. Therefore, both corotating and counterrotating rings have to be considered as being a constituent of the ringed disk. We provide constraints on the model parameters for the existence and stability of various ringed configurations and discuss occurrence of accretion onto the Kerr black hole and possible launching of jets from the ringed disk. We demonstrate that various ringed disks can be characterized by a maxi
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