Typical scales in the clustering of the Universe.

Details Typical scales in the clustering of the Universe. Typical scales in the clustering of the Universe.

Aug 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995ijmpd...4..417l&link_type=abstract

International Journal of Modern Physics D, Vol. 4, No. 4, p. 417 - 428

Physics

Universe: Clustering, Universe: Large-Scale Structure

Scientific paper

The cosmic density perturbations are not completely scale-free, i.e. preferential scales should exist in the clustering of the Universe. Observations do show the existence of the typical scales, namely, the distribution of various objects cannot be described by a simple fractal law. A method based on identifying the periodic components in two-point correlation functions was developed and the typical scales have been systematically searched for in samples of galaxies, clusters of galaxies, quasars and absorption lines of quasars. It showed the existence of typical scales in the range of 20 - 130 h-1Mpc with high confidence. In particular, two typical scales, 60 h-1Mpc and 130 h-1Mpc, have been detected in all the samples being analysed. Such "universal" scales are probably the characteristic scales in the primordial fluctuations of the universe. Other theoretical implications of the detected typical scales have also been reviewed.

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