Statistical properties of galaxy distributions

F. Sylos Labini (1) , L. Pietronero (1)

1 INFM Sezione de Romal

The recent availability of complete three dimensional samples of galaxies and clusters permits a direct study of their spatial properties. We present a brief review of galaxy correlations based on the methods modern statistical Physics. These methods which able to identify self-similar and non-analytical prop ties, allow us to test the usual homogeneity assumption of luminous matter distribution. We conclude that both the three dimensional prop ties, and the angular log N - log S relation, point out the fact that the distribution of galaxies and clusters fractal with D ? 2 up to the deepest scale probed luminous matter (?? 1000h^-1 Mpc). This result has important implications for the theoretical framework that should be adopted.

Domaines: Cosmologie et astrophysique extra-galactique [astro-ph.CO]; Astrophysique [astro-ph]; Sciences de la Terre

F. Sylos Labini, L. Pietronero. Statistical properties of galaxy distributions. Nonlinear Processes in Geophysics, 1996, 3 (4), pp.274-283. ⟨hal-00301833⟩