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

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 Organize...

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Bibliographic Details
Published in:Proceedings of the International Astronomical Union 2012-08, Vol.8 (S290), p.245-246
Main Authors: Kunjaya, Chatief, Mahasena, Putra, Vierdayanti, Kiki, Herlie, Stefani
Format: Article
Language:English
Subjects:
Accretion disks
Astronomy
Astrophysics
Black holes
Contributed Papers
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Summary: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.
ISSN:1743-9213
1743-9221
DOI:10.1017/S1743921312019837