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Prog. Theor. Phys. Vol. 78 No. 6 (1987) pp. 1288-1299

The Dipole Anisotropy in the Decaying-Particle Universe Models with Nonzero Cosmological Constant

Kenji Tomita and Naoshi Sugiyama

Research Institute for Theoretical Physics, Hiroshima University, Takehara, Hiroshima 725

(Received July 13, 1987)

Abstract:

The ratio (Φ) of 4 π times the velocity perturbations to the dipole moment of the galactic density perturbations is derived in decaying-particle universe models with nonzero cosmological constant in two cases: the first case of only massless daughter particles and the second case in which the daughter particles consist of a massless particle and a massive particle. For the various values of τ_d (= the decay time × the Hubble constant), the curves of constant Φ are shown in the (Ω₀, λ₀) diagram, and the allowable regions satisfying the observational relation Φ≃0.9 in it are examined. For a comparison the curves in the non-decay dust universe models also are shown.

URL : http://ptp.ipap.jp/link?PTP/78/1288/
DOI : 10.1143/PTP.78.1288

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Citing Article(s) :

1. Progress of Theoretical Physics Vol. 79 No. 6 (1988) pp. 1345-1364 :

   Clustering of Galaxies and Clusters of Galaxies in a Decaying-Particle Cosmological Model with a Massive Decay Product

   Kenji Tomita

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