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Please use this identifier to cite or link to this item: http://repositorio.ufba.br/ri/handle/ri/16280

Title: Fluctuation analysis of stellar x-ray binary systems
Other Titles: Physical Review E
Authors: Nogueira Júnior, E.
Moret, M. A.
Zebende, G. F.
Pereira, M. G.
Issue Date: 2003
Abstract: 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).
Description: p. 1-4
URI: http://repositorio.ufba.br/ri/handle/ri/16280
ISSN: 1539-3755
Appears in Collections:Artigos Publicados em Periódicos (FIS)

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