Mathematics – Logic
Scientific paper
Jan 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993egte.conf...66t&link_type=abstract
In NASA. Ames Research Center, The Evolution of Galaxies and Their Environment p 66-67 (SEE N93-26706 10-90)
Mathematics
Logic
Adiabatic Conditions, Astronomical Models, Cosmology, Dark Matter, Galaxies, Peculiar Galaxies, Perturbation Theory, Velocity Distribution, Mathematical Models, Universe
Scientific paper
It is generally accepted that some kind of non-baryonic dark matter accounts for most of the mass density of the universe. Considering such a component has become, in the last decade, a key ingredient in current theories of structure formation. In particular, the Cold Dark Matter (CDM) scenario has proven to be quite successful in explaining most of the observed properties of galaxies and of their large-scale distribution. The standard CDM model is characterized by a primordial Zel'dovich spectrum, of random-phase adiabatic perturbations in a universe with density parameter omega sub 0 = 1 and vanishing cosmological constant. This poster paper presents an analysis of observational data on peculiar motion of optical galaxies in comparison to the predictions of CDM models where the assumptions of the standard scenario: omega sub 0 = 1, n = 1, and bias parameter b = 1 are relaxed. In particular, CDM models with 0 less than n less than 1 and 0.4 less than omega sub 0 less than 1 are considered.
Lucchin Francesco
Matarrese Sabino
Moscardini Lauro
Tormen Giuseppe
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