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

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

Language

English

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

RIV identification code

RIV/47813059:19240/17:A0000024

Organization unit

Faculty of Philosophy and Science in Opava

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.
Změněno: 5/4/2018 14:51, RNDr. Jan Hladík, Ph.D.

Abstract

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.