Nonextensivity and Galaxy Clustering in the Universe

Abstract

We investigate two important questions about the use of the nonextensive thermostatistics (NETS) formalism in the context of nonlinear galaxy clustering in the Universe. Firstly, we define a quantitative criterion for justifying nonextensivity at different physical scales. Then, we discuss the physics behind the ansatz of the entropic parameter $q(r)$. Our results suggest the approximate range where nonextensivity can be justified and, hence, give some support to the applicability of NETS to the study of large scale structures.

8 pages, written version of a talk presented in the International Workshop on Trends and Perspectives on Extensive and Non-Extensive Statistical Mechanics. Accepted for publication in Physica A

References in corpus (1)

• The 2dF Galaxy Redshift Survey: correlation functions, peculiar velocities and the matter density of the Universe

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• Evidence of Turbulence-like Universality on the Formation of Galaxy-sized Dark Matter Haloes