Nonextensivity and Galaxy Clustering in the Universe

Details Nonextensivity and Galaxy Clustering in the Universe Nonextensivity and Galaxy Clustering in the Universe

2004-03-19

arxiv.org/abs/astro-ph/0403472v1

Physica A344 (2004) 743-749

Astronomy and Astrophysics

Astrophysics

8 pages, written version of a talk presented in the International Workshop on Trends and Perspectives on Extensive and Non-Ext

Scientific paper

10.1016/j.physa.2004.06.056

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.

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