PUGLIESE, Daniela and Zdeněk STUCHLÍK. General relativistic rotational energy extraction from black holes-accretion disk systems. Classical and Quantum Gravity. GB - Spojené království Velké Británie a, 2021, vol. 38, No 14, p. "145014-1"-"145014-44", 44 pp. ISSN 0264-9381. Available from: https://dx.doi.org/10.1088/1361-6382/abff97.
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Basic information
Original name General relativistic rotational energy extraction from black holes-accretion disk systems
Authors PUGLIESE, Daniela (380 Italy, belonging to the institution) and Zdeněk STUCHLÍK (203 Czech Republic, belonging to the institution).
Edition Classical and Quantum Gravity, GB - Spojené království Velké Británie a, 2021, 0264-9381.
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 URL
RIV identification code RIV/47813059:19630/21:A0000104
Organization unit Institute of physics in Opava
Doi http://dx.doi.org/10.1088/1361-6382/abff97
UT WoS 000666949500001
Keywords in English black holes;accretion disks; accretion; hydrodynamics; galaxies; active; galaxies; jets
Tags 2022, FÚ, RIV22
Tags International impact, Reviewed
Links GA19-03950S, research and development project.
Changed by Changed by: Mgr. Pavlína Jalůvková, učo 25213. Changed: 28/3/2022 11:24.
Abstract
The determination of mass and spin parameters of the black holes (BHs) is crucial in the analysis of the merger of BHs and BHs formation and evolution, including accretion. Here we constrain the BH spin with the evaluation of the dimensionless parameter xi representing the total rotational energy extracted versus the mass of the BH, following procedure introduced by Daly (2009 Astrophys. J. 691 L72-6) that is independent from the details of the specific extraction process. The energy extraction can power an outflow which can be then observed. We relate the energy extraction to the accreting configurations and the accretion processes occurring in a cluster of agglomerate corotating and counter-rotating tori orbiting one central Kerr SMBH, associating xi to the characteristics of the accretion processes. We relate the regions of tori parameters to features of the energy extraction processes, binding xi to properties of light surfaces by using the bundles developed by Pugliese and Quevedo (2019 Eur. Phys. J. C 79 209), relating measures in different regions of the spacetimes. We evaluate properties of the BH accretions disks, and correlate spacetimes prior and after their transition due to the energy extraction. Light surfaces are related to the generators of Killing horizons, proving limiting frequency of the stationary observers of the geometries. We consider the photon limiting curves of the stationary observers as constraints for various processes regulated by these frequencies, to relate different BH states, prior and after the energy extraction, investigating regions close to the BH horizons and rotational axis. From methodological view-point we used a naked singularity-BH correspondence defined with metric bundles to predict observational characteristics of the BH-accretion disk system. The analysis points relevant BH spins a approximate to 0.94M, a approximate to 0.7M and a approximate to 0.3M. We show the relation between the rotational law of the tori, the characteristic frequency of the bundle and the relativistic velocity defining the von Zeipel surfaces. The inferior limit on the formation of corotating tori is l/a > 2, for counter-rotating tori l/a <= -22/5 (l is the fluids specific angular momentum).
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