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X-ray properties of reverberation-mapped AGNs with super-Eddington accreting massive black holes

Published online by Cambridge University Press:  29 January 2021

Jaya Maithil ,
Michael S. Brotherton ,
Bin Luo ,
Ohad Shemmer ,
Sarah C. Gallagher ,
Du Pu ,
Hu Chen ,
Jian-Min Wang  and
Yan-Rong Li
Jaya Maithil
Affiliation:
Department of Physics & Astronomy, University of Wyoming, Laramie, WY82071, USA
Michael S. Brotherton
Affiliation:
Department of Physics & Astronomy, University of Wyoming, Laramie, WY82071, USA
Bin Luo
Affiliation:
School of Astronomy and Space Science, Nanjing University, Nanjing, Jiangsu210093, China
Ohad Shemmer
Affiliation:
Department of Physics, University of North Texas, Denton, TX76203, USA
Sarah C. Gallagher
Affiliation:
Department of Physics & Astronomy, University of Western Ontario, London, ON N6C 1T7, Canada
Du Pu
Affiliation:
Key Laboratory for Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing100049, China
Hu Chen
Affiliation:
Key Laboratory for Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing100049, China
Jian-Min Wang
Affiliation:
Key Laboratory for Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing100049, China
Yan-Rong Li
Affiliation:
Key Laboratory for Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing100049, China
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Abstract

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Active Galactic Nuclei (AGN) exhibit multi-wavelength properties that are representative of the underlying physical processes taking place in the vicinity of the accreting supermassive black hole. The black hole mass and the accretion rate are fundamental for understanding the growth of black holes, their evolution, and the impact on the host galaxies. Recent results on reverberation-mapped AGNs show that the highest accretion rate objects have systematic shorter time-lags. These super-Eddington accreting massive black holes (SEAMBHs) show BLR size 3-8 times smaller than predicted by the Radius-Luminosity (R-L) relationship. Hence, the single-epoch virial black hole mass estimates of highly accreting AGNs have an overestimation of a factor of 3-8 times. SEAMBHs likely have a slim accretion disk rather than a thin disk that is diagnostic in X-ray. I will present the extreme X-ray properties of a sample of dozen of SEAMBHs. They indeed have a steep hard X-ray photon index, Γ, and demonstrate a steeper power-law slope, ασx.

Keywords

galaxies: activegalaxies: X-rays
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S356: Nuclear Activity in Galaxies Across Cosmic Time , October 2019 , pp. 143
Copyright
© The Author(s), 2021. Published by Cambridge University Press on behalf of International Astronomical Union