Abstract
We examine the time variation of the total X-ray flux from three sources and find that the signal from the Crab (non-accreting) is uncorrelated, the Cygnus X-1 signal is correlated on timescales up to three years, and in the GRS1915+105 signal correlation may extend to only a few days. The method we use also quantifies the distributions of fluctuations and hence constrains turbulence/instability models of accretion disks.
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References
Bohr, T. et al. 1998, Dynamical Systems Approach to Turbulence (Cambridge)
Greenhough, J. et al. 2001, astro-ph/0107074
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© 2003 Springer-Verlag New York, Inc.
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Greenhough, J., Chapman, S.C., Chaty, S., Dendy, R.O., Rowlands, G. (2003). Characterising Anomalous Transport in Accretion Disks from X-ray Observations. In: Statistical Challenges in Astronomy. Springer, New York, NY. https://doi.org/10.1007/0-387-21529-8_38
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DOI: https://doi.org/10.1007/0-387-21529-8_38
Publisher Name: Springer, New York, NY
Print ISBN: 978-0-387-95546-9
Online ISBN: 978-0-387-21529-7
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