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X-ray binary systems and nonextensivity

Author

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  • Moret, Marcelo A.
  • de Senna, Valter
  • Zebende, Gilney F.
  • Vaveliuk, Pablo

Abstract

We study the x-ray intensity variations obtained from the time series of 155 light curves of x-ray binary systems collected by the instrument All Sky Monitor on board the satellite Rossi X-Ray Timing Explorer. These intensity distributions are adequately fitted by q-Gaussian distributions which maximize the Tsallis entropy and in turn satisfy a nonlinear Fokker–Planck equation, indicating their nonextensive and nonequilibrium behavior. From the values of the entropic index q obtained, we give a physical interpretation of the dynamics in x-ray binary systems based on the kinetic foundation of generalized thermostatistics. The present findings indicate that the binary systems display a nonextensive and turbulent behavior.

Suggested Citation

  • Moret, Marcelo A. & de Senna, Valter & Zebende, Gilney F. & Vaveliuk, Pablo, 2010. "X-ray binary systems and nonextensivity," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 389(4), pages 854-858.
    • Handle: RePEc:eee:phsmap:v:389:y:2010:i:4:p:854-858
    DOI: 10.1016/j.physa.2009.10.024
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    Keywords

    Astrophysical sources; Tsallis statistics;

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