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

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

Dec 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pthph..78.1288t&link_type=abstract

Progress of Theoretical Physics, Vol. 78, No. 6, pp. 1288-1299

Physics

1

Scientific paper

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 taud (= the decay time x the Hubble constant), the curves of constant Phi are shown in the (Omega0, lambda0) diagram, and the allowable regions satisfying the observational relation Phi =~ 0.9 in it are examined. For a comparison the curves in the non-decay dust universe models also are shown.

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