Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986rspta.320..517f&link_type=abstract
(Royal Society Discussion on Material Content of the Universe, London, England, Oct. 23, 24, 1985) Royal Society (London), Philo
Astronomy and Astrophysics
Astronomy
7
Astronomical Models, Big Bang Cosmology, Dark Matter, Galactic Clusters, Universe, Correlation, Halos, Many Body Problem, Neutrinos, Nonlinearity, Spatial Distribution
Scientific paper
An evaluation is made of the implications of recent observational and theoretical study results concerning galaxy clustering. The simple assumption that the distribution of galaxies generally follows that of the mass appears to conflict with observations suggesting that galaxies of different kinds are clustered in different ways. Attention is given to specific models for the behavior of density fluctuations from early times to the present epoch. Universes dominated by light neutrinos acquire a large coherence length at early times, so that an early filamentary phase develops into a current distribution that is more strongly clustered than observed galaxies and is dominated by a few clumps with masses that are larger than those of any known object. If the dark matter consists of such cold particles as photinos or axions, then structure builds up from subgalactic scales in an approximately hierarchical way.
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