J 2019

RADs energetics and constraints on emerging tori collisions around super-massive Kerr black holes

PUGLIESE, Daniela and Zdeněk STUCHLÍK

Basic information

Original name

RADs energetics and constraints on emerging tori collisions around super-massive Kerr black holes

Authors

PUGLIESE, Daniela (380 Italy, guarantor, belonging to the institution) and Zdeněk STUCHLÍK (203 Czech Republic, belonging to the institution)

Edition

European Physical Journal C, 2019, 1434-6044

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10308 Astronomy

Country of publisher

Germany

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

RIV identification code

RIV/47813059:19240/19:A0000421

Organization unit

Faculty of Philosophy and Science in Opava

UT WoS

000463381000002

Keywords in English

accretion disks; Kerr black hole; stability; X-ray emission

Tags

International impact, Reviewed

Links

GB14-37086G, research and development project. GJ16-03564Y, research and development project.
Změněno: 20/3/2020 09:47, RNDr. Jan Hladík, Ph.D.

Abstract

V originále

We provide constraints on possible configurations and interactions of two coplanar tori orbiting a central Kerr black hole (BH), in dependence on its dimensionless spin. The two-tori configurations can be directly linked to the current models featuring the obscuration of galactic BH X-ray emission. The emergence of each torus instability phases is discussed and tori collision has been also investigated. The first simple evaluation of the center-of-mass energy proves that collision-energy-efficiency increases with the dimensionless BH spin. We explore the phenomenological aspects of the corotating and counterrotating tori by analyzing properties of the orbiting toroidal configurations related to the fluid enthalpy flux, the mass-flux, the mass-accretion-rates, and the cusp luminosity in the two cases of corotating and counterrotating fluids in dependence on the SMBH spin. The analysis resulted ultimately in a comparative investigation of the properties of corotating versus counterrotating tori, demonstrating that two accretion tori can orbit around the central Kerr attractor only under very specific conditions. Our results also demonstrate that the dynamics of the unstable phases of these double tori systems is significant for the high energy phenomena which could be observable in the X-ray emission and extremely energetic phenomena in active galactic nuclei and quasar.