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Ratio of kinetic-to-bolometric luminosity at the “cold” disk accretion onto black holes

Published online by Cambridge University Press:  07 April 2020

Sergey Bogovalov Open the ORCID record for Sergey Bogovalov [Opens in a new window]
Sergey Bogovalov*
Affiliation:
National Research Nuclear University (MEPHI), Kashirskoje shosse, 31, Moscow, Russia email: svbogovalov@mephi.ru
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Abstract

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In galactic nuclei (AGN), the kinetic energy flux of the jet may exceed the bolometric luminosity of the disk a few orders of magnitude. At the “cold” accretion the radiation from the disk is suppressed because the wind from the disk carries out almost all the angular momentum and the gravitational energy of the accreted material. We calculate an unavoidable radiation from such a disk and the ratio of the kinetic-to-bolometric luminosity from a super massive black hole in framework of the paradigm of the optically thick α-disk of Shakura & Sunyaev. The results confirm that the gravitational energy of the accreted material can be the only source of energy in AGNs.

Keywords

accretion disksmagnetohydrodynamicsgalaxies: jets
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S342: Perseus in Sicily: From Black Hole to Cluster Outskirts , May 2018 , pp. 205 - 208
Copyright
© International Astronomical Union 2020

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