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Contribution of Advection Process in SOC Model Causing the Appearance of Lognormal Distribution in Emission

Published online by Cambridge University Press:  21 February 2013

Chatief Kunjaya ,
Putra Mahasena ,
Kiki Vierdayanti  and
Stefani Herlie
Chatief Kunjaya
Affiliation:
Fac. Mathematics and Natural Sciences, Institut Teknologi Bandung, INDONESIA
Putra Mahasena
Affiliation:
Fac. Mathematics and Natural Sciences, Institut Teknologi Bandung, INDONESIA
Kiki Vierdayanti
Affiliation:
Fac. Mathematics and Natural Sciences, Institut Teknologi Bandung, INDONESIA
Stefani Herlie
Affiliation:
Fac. Mathematics and Natural Sciences, Institut Teknologi Bandung, INDONESIA
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Abstract

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Emission variability from Black Hole objects like Seyfert Galaxies, Quasars etc. shows a irregular variation with various amplitude and time scale. Further analysis of the emission shows the appearance of the lognormal distribution. Such distribution cannot be explained by conventional Self Organized Criticality (SOC) Model. In this paper a modified SOC model with cellular automaton mechanism combined with advection process is introduced. Simulation shows that lognormal distribution can be resulted, while the other characteristics of PSD and structure function of the original SOC model can be maintained. Incorporation of the advection process is the key factor for the appearance of lognormal distribution.

Keywords

Accretionaccretion Disks
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S290: Feeding Compact Objects: Accretion on All Scales , August 2012 , pp. 245 - 246
Copyright
Copyright © International Astronomical Union 2013

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