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X-ray fluctuation timescale and Black Hole mass relation in AGN

Published online by Cambridge University Press:  23 June 2017

Amri Wandel  and
Mathew Malkan
Amri Wandel
Affiliation:
Racah Institute, The Hebrew University of Jerusalem, Jerusalem 91904, Israel email: [email protected]
Mathew Malkan
Affiliation:
Dept. of Astronomy, University of California, Los Angeles, California, U.S.A. email: [email protected]
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Abstract

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We analyze the fluctuations in the X-ray flux of 20 AGN (mainly Seyfert 1 galaxies) monitored by RXTE and XMM-Newton with a sampling frequency ranging from hours to years, using structure function (SF) analysis. We derive SFs over four orders of magnitude in the time domain (0.03-300 days). Most objects show a characteristic time scale, where the SF flattens or changes slope. For 10 objects with published power-spectral density (PSD) the break time scales in the SF and PSD are similar and show a good correlation. We also find a significant correlation between the SF timescale and the mass of the central black hole, determined for most objects by reverberation mapping.

Keywords

AGNX-rayFluctuationsStructure FunctionsPower Spectral DensityBlack Holes
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S324: New Frontiers in Black Hole Astrophysics , September 2016 , pp. 172 - 175
Copyright
Copyright © International Astronomical Union 2017 

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