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Nonextensivity and entropy of astrophysical sources

Author

Listed:
  • Rosa, A.C.P.
  • de Jesus, J.C.O.
  • Moret, M.A.

Abstract

We study the X-ray intensities of 142 light curves of cataclysmic variables, galaxies, pulsars, supernova remnants and other X-ray sources present in the public data collected by the instrument All Sky Monitor on board the satellite Rossi X-ray Timing Explorer. We show that the X-ray light curves coming from astrophysical systems obey Tsallis’s q-Gaussian distribution as probability density. This fact strongly suggests that these astrophysical systems behave in a non-extensive manner. Furthermore, the q entropic indices for these systems were obtained and they provide an indication of the nonextensivity degree of each of these astrophysical systems. The q-value increases for systems if the Tsallis entropy decreases.

Suggested Citation

  • Rosa, A.C.P. & de Jesus, J.C.O. & Moret, M.A., 2013. "Nonextensivity and entropy of astrophysical sources," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 392(23), pages 6079-6083.
    • Handle: RePEc:eee:phsmap:v:392:y:2013:i:23:p:6079-6083
    DOI: 10.1016/j.physa.2013.07.034
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    Cited by:

    1. Zhang, Qi & Luo, Chuanhai & Li, Meizhu & Deng, Yong & Mahadevan, Sankaran, 2015. "Tsallis information dimension of complex networks," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 419(C), pages 707-717.
    2. Deng, Xinyang & Deng, Yong, 2014. "On the axiomatic requirement of range to measure uncertainty," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 406(C), pages 163-168.

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