Empirical testing of Tsallis' Thermodynamics as a model for dark matter halos

Details Empirical testing of Tsallis' Thermodynamics as a model for dark matter halos Empirical testing of Tsallis' Thermodynamics as a model for dark matter halos

2006-04-06

arxiv.org/abs/astro-ph/0604126v1

Astronomy and Astrophysics

Astrophysics

5 pages, 1 figure, To appear in the Proceedings of X Mexican Workshop on Particles and Fields, Morelia Michoac\'an, M\'exico,

Scientific paper

10.1063/1.2359275

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.

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