Decaying-Particle Universe Models with Nonzero Cosmological Constant and the Galactic Number Count Observation

Details Decaying-Particle Universe Models with Nonzero Cosmological Constant and the Galactic Number Count Observation Decaying-Particle Universe Models with Nonzero Cosmological Constant and the Galactic Number Count Observation

Jul 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pthph..78..105t&link_type=abstract

Progress of Theoretical Physics, Vol. 78, No. 1, pp. 105-113

Physics

3

Scientific paper

Decaying-particle universe models with nonzero cosmological constant Lambda are considered in connection with the recent observational [Galaxy number count N-redshift z] relation and it is shown that the best-fitted values of Lambda and the density parameter Omega0 depend on the decay time td: For H0td=0.05, we get Omega0=0.494 and Lambdac(2}/(3H0({2)) )=-0.046. If the model is required to be flat, the fitted values are Omega0=0.689 and Lambdac(2}/(3H0({2)) )=0.311 for H0td=0.05. The cosmic ages are found to be of the order of or larger than 0.6/H0 in the fitted models. Moreover the nonlinear growth of the density perturbations is considered and the evolution of the baryon density is examined in several fitted models.

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