ISSN:
1572-946X
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract This work is the continuation of the search for such a cosmological model using which the observed redshift distribution of galaxies in the sample of Broadhurstet al. (1990) turns out to be maximally periodic in the calculated spatial distance. In a previous work, Paálet al. (1992) have demonstrated that among theflat models with non-negative cosmological constant (e.e., vacuum density) the one with a vacuum: dust ratio 2:1 provides the optimum. Now we extend that study to the case of arbitrary space curvature and find equally good periodicity in a surprisingly wide range of models. By use of the dimensionless parameters Ω0=ρ 0/ρ crit andλ 0=Λ/3H 0 2 acceptable periodicity is obtained forall points of the parameter plane within the strip between the parallel lines 0.83Ω0−0.30〈λ 0(Ω0)〈0.83Ω0+0.85(Ω0〈1.8), whilst the best periodicities appear along the lineλ 0=0.83Ω0+0.39 fitting to the previous optimum at Ω0=1/3,λ 0=2/3. Any nonpositive value ofλ 0 gives bad periodicity unless the space curvature is strongly negative and Ω0〈0.4. Fairly good periodicity is observed only in the range of the deceleration parameter −1.2≤q 0〈0.2, corresponding to a small or even negative total gravitational attraction and an expansion time-scale longer than usually expected.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00644305
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