J
2017
Ringed Accretion Disks: Evolution of Double Toroidal Configurations
PUGLIESE, Daniela and Zdeněk STUCHLÍK
Basic information
Original name
Ringed Accretion Disks: Evolution of Double Toroidal Configurations
Edition
Astrophysical Journal Supplement Series, 2017, 0067-0049
Other information
Type of outcome
Článek v odborném periodiku
Field of Study
10308 Astronomy
Country of publisher
United Kingdom of Great Britain and Northern Ireland
Confidentiality degree
není předmětem státního či obchodního tajemství
Impact factor
Impact factor: 8.561
RIV identification code
RIV/47813059:19240/17:A0000024
Organization unit
Faculty of Philosophy and Science in Opava
Keywords in English
accretion; accretion disks; black hole physics; hydrodynamics
Tags
International impact, Reviewed
Links
GB14-37086G, research and development project. GJ16-03564Y, research and development project.
V originále
We investigate ringed accretion disks composed of two tori (rings) orbiting on the equatorial plane of a central supermassive Kerr black hole. We discuss the emergence of the instability phases of each ring of the macro-configuration (ringed disk) according to the Paczynski violation of mechanical equilibrium. In the full general relativistic treatment, we consider the effects of the geometry of the Kerr spacetimes relevant to the characterization of the evolution of these configurations. The discussion of ring stability in different spacetimes enables us to identify particular classes of central Kerr attractors depending on their dimensionless spin. As a result of this analysis, we set constraints on the evolutionary schemes of the ringed disks relative to the torus morphology and on their rotation relative to the central black hole and to each other. The dynamics of the unstable phases of this system is significant for the high-energy phenomena related to accretion onto supermassive black holes in active galactic nuclei and the extremely energetic phenomena in quasars, which could be observed in their X-ray emission.
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