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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) |
Files in This Item:
File | Description | Size | Format | |
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Nonextensivity ....pdf | 399.94 kB | Adobe PDF | View/Open |
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