Please use this identifier to cite or link to this item: http://repositoriosenaiba.fieb.org.br/handle/fieb/634
Title: Nonextensivity and entropy of astrophysical sources
Other Titles: Physica A
Authors: Rosa Júnior, A. C. P.
Jesus, J. C. O. de
Moret, M. A.
Keywords: Tsallis statistic;Entropic index;Long-tail distribution
Issue Date: 2013
Citation: ROSA JÚNIOR, A. C. P.; JESUS, J. C. O. de.; MORET, M. A. Nonextensivity and entropy of astrophysical sources. Physica A, Amsterdam, v. 392, 2013. p. 6079-6083.
Abstract: Westudy 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.
Description: p. 6079-6083
URI: http://repositoriosenaiba.fieb.org.br/handle/fieb/634
Appears in Collections:Artigos Publicados em Periódicos (PPG MCTI)

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