X-ray binary systems and nonextensivity

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

Physica A: Statistical Mechanics and its Applications, 2010, vol. 389, issue 4, 854-858

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.

Keywords: Astrophysical sources; Tsallis statistics (search for similar items in EconPapers)
Date: 2010
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:389:y:2010:i:4:p:854-858

DOI: 10.1016/j.physa.2009.10.024

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