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Cosmic vacuum and galaxy formation

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It is demonstrated that the protogalactic perturbations must enter the nonlinear regime before the red shift z˜ 1; otherwise they would be destroyed by the antigravity of the vacuum dark energy at the subsequent epoch of the vacuum domination. At the z<1 epoch, gravitational instability can develop only in the nonlinear regime and within areas of size r<r V={M/[(8π/3)ρV]}1/3, where M is the mass of a given over-density and ρV is the vacuum density. The criterion provides a new relation between the largest mass condensations and their spatial scales. All the real large-scale systems follow this relation definitely. It is also shown that a simple formula is possible for the key quantity in the theory of galaxy formation, namely the initial amplitude of the perturbation of the gravitational potential in the protogalactic structures. The amplitude is time independent and given in terms of the Friedmann integrals, which are genuine physical characteristics of the cosmic energies. The results suggest that there is a strong correspondence between the global design of the Universe as a whole and the cosmic structures of various masses and spatial scales.

Keywords: Cosmology theory; Dark matter; Vacuum

Document Type: Research Article


Affiliations: Tuorla Observatory, University of Turku, Piikkiƶ, FIN-21500, Finland

Publication date: April 1, 2006

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