Empirical testing of Tsallis' Thermodynamics as a model for dark matter   halos
  We study a dark matter halo model from two points of view: the ``stellar polytrope'' (SP) model coming from Tsallis' thermodynamics, and the one coming from the Navarro-Frenk-White (NFW) paradigm. We make an appropriate comparison between both halo models and analyzing the relations between the global physical parameters of observed galactic disks, coming from a sample of actual galaxies, with the ones of the unobserved dark matter halos, we conclude that the SP model is favored over the NFW model in such a comparison. 
Dario Nunez, Roberto A. Sussman, Jesus Zavala, Luis G. Cabral-Rosetti   and Tonatiuh Matos