Volume 54, Number 3, May 2001
|Page(s)||286 - 292|
|Published online||01 December 2003|
Fluctuations in galaxy counts: A new test for homogeneity vs. fractality
Laboratoire de la Physique de la Matière Condensée,
91128, Palaiseau Cedex, France
2 INFM Sezione di Roma1, Dipartimento di Fisica, Università di Roma "La Sapienza" P.le A. Moro 2, I-00185 Roma, Italy
3 Département de Physique Théorique, Université de Genève 24 Quai E. Ansermet, CH-1211 Genève, Switzerland
Accepted: 22 February 2001
Fractal properties are usually characterized by means of various statistical tools which deal with spatial average quantities. Here we focus on the determination of fluctuations around the average counts and we develop a test for the study of galaxy distribution both in redshift and magnitude space. Fluctuations in the counts of galaxies, in a fractal distribution, are of the same order of the average number at all scales as a function of redshift and magnitude. We point out that the study of these kinds of fluctuations can be a powerful test to understand the nature of galaxy clustering at very large scales.
PACS: 05.20.-y – Classical statistical mechanics / 98.65.-r – Galaxy groups, clusters, and superclusters; large scale structure of the Universe
© EDP Sciences, 2001
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