Fluctuation analysis of stellar x-ray binary systems

Details Fluctuation analysis of stellar x-ray binary systems Fluctuation analysis of stellar x-ray binary systems

Oct 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003phrve..68d1104m&link_type=abstract

Physical Review E, vol. 68, Issue 4, id. 041104

Physics

14

Fluctuation Phenomena, Random Processes, Noise, And Brownian Motion, Time Series Analysis, Binary And Multiple Stars

Scientific paper

We study time series of x-ray sources of 129 stellar binary systems present in the public data collected by the instrument All Sky Monitor on board of the satellite Rossi X-Ray Timing Explorer. The light time series was analyzed by applying detrended fluctuation analysis to estimate the long-range power-law correlation exponents α. The scaling exponent was calculated for all systems and its value indicated a signature of each kind of system, i.e., whether flare takes place (with α=1.22) or not (with α=0.64). As a consequence, our results may identify the stability of the systems from the scaling exponent α value, for instance, if α˜0.5 (white noise) the system is stable and unstable when α≠0.5 (long-range power-law correlation).

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