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On the relationship between black hole mass and X-ray variability amplitude in the low-mass regime of active galactic nuclei

Published online by Cambridge University Press:  07 March 2016

H. Pan ,
W. Yuan ,
X.-L. Zhou ,
X. Dong  and
B. Liu
H. Pan
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing, China email: panhaiwu@bao.ac.cn
W. Yuan
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing, China email: panhaiwu@bao.ac.cn
X.-L. Zhou
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing, China email: panhaiwu@bao.ac.cn
X. Dong
Affiliation:
Yunnan Observatories, Chinese Academy of Sciences, Kunming, Yunnan, China
B. Liu
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing, China email: panhaiwu@bao.ac.cn
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Abstract

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Recent studies of active galactic nuclei (AGN) found a statistical inverse scaling between the X-ray normalized excess variance σrms2 (variability amplitude) and the black hole mass spanning over MBH = 106 − 109M⊙. We present a study of this relation by including AGN with MBH = 105 − 106M⊙. It is found that the relation is no longer a simple extrapolation of the known inverse proportion, but starts to flatten around 106M⊙. This behavior can be understood by the shape of the power spectrum density of AGN and its dependence on the black hole mass.

Keywords

galaxies: activegalaxies: nucleiX-rays: galaxies
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 10 , Issue S312: Star Clusters and Black Holes in Galaxies across Cosmic Time , August 2014 , pp. 73 - 74
Copyright
Copyright © International Astronomical Union 2016 

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