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

摘要

The ratio (PHI) of 4 pi 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 tau/sub d/ (= the decay time x the Hubble constant), the curves of constant PHI are shown in the ( omega /sub 0/, lambda/sub 0/) diagram, and the allowable regions satisfying the observational relation PHI approx. = 0.9 in it are examined. For a comparison the curves in the non-decay dust universe models also are shown. (ERA citation 13:016495)