PUGLIESE, Daniela and Zdeněk STUCHLÍK. Ringed Accretion Disks: Evolution of Double Toroidal Configurations. Astrophysical Journal Supplement Series. 2017, vol. 229, No 2, p. „40-1“-„40-28“, 28 pp. ISSN 0067-0049. Available from: https://dx.doi.org/10.3847/1538-4365/aa68e6.
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Basic information
Original name Ringed Accretion Disks: Evolution of Double Toroidal Configurations
Authors PUGLIESE, Daniela (380 Italy, belonging to the institution) and Zdeněk STUCHLÍK (203 Czech Republic, belonging to the institution).
Edition Astrophysical Journal Supplement Series, 2017, 0067-0049.
Other information
Original language English
Type of outcome Article in a journal
Field of Study 10308 Astronomy
Country of publisher United Kingdom of Great Britain and Northern Ireland
Confidentiality degree is not subject to a state or trade secret
WWW The Astrophysical Journal Supplement Series
RIV identification code RIV/47813059:19240/17:A0000024
Organization unit Faculty of Philosophy and Science in Opava
Doi http://dx.doi.org/10.3847/1538-4365/aa68e6
UT WoS 000399583600003
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.
Changed by Changed by: RNDr. Jan Hladík, Ph.D., učo 25379. Changed: 5/4/2018 14:51.
Abstract
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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