Linear and nonlinear time series analysis of the black hole candidate Cygnus X-1

Details Linear and nonlinear time series analysis of the black hole candidate Cygnus X-1 Linear and nonlinear time series analysis of the black hole candidate Cygnus X-1

Feb 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000phrve..61.1342t&link_type=abstract

Physical Review E (Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics), Volume 61, Issue 2, February 200

Physics

16

Fluctuation Phenomena, Random Processes, Noise, And Brownian Motion, X-Ray Binaries

Scientific paper

We analyze the variability in the x-ray lightcurves of the black hole candidate Cygnus X-1 by linear and nonlinear time series analysis methods. While a linear model describes the overall second order properties of the observed data well, surrogate data analysis reveals a significant deviation from linearity. We discuss the relation between shot noise models usually applied to analyze these data and linear stochastic autoregressive models. We debate statistical and interpretational issues of surrogate data testing for the present context. Finally, we suggest a combination of tools from linear and nonlinear time series analysis methods as a procedure to test the predictions of astrophysical models on observed data.

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