Department of Physics, Nanjing Normal University, Nanjing 210097
Department of Fundamental Sciences, North China Electric Power University, Beijing 102206
Equilibrium Correlations in a Clustering Universe
ZHANG Hang1;HUANG Xia2;LI Xiao-Qing1
Department of Physics, Nanjing Normal University, Nanjing 210097
Department of Fundamental Sciences, North China Electric Power University, Beijing 102206
Abstract： It is shown that the observed result of two-point galaxy correlation function and three-point correlation function in the universe agrees with a quasi-equilibrium assumption of mass distribution. Utilizing the form of the three-point correlation, we find that the two-point correlation function can be obtained by solving an equation derived from maximizing an entropy under some constraints in a self-gravitating particle model. A generalized non-extensive entropy is also introduced to improve our result.
2003, Vol. 20 
