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

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概要

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• Decaying-particle universe models with nonzero cosmological constant ∧ 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 ∧ and the density parameter Ω_0 depend on the decay time t_d: For H_0t_d=0.05, we get Ω_0=0.494 and ∧c^2/(3H_0^2)=-0.046. If the model is required to be flat, the fitted values are Ω_0=0.689 and ∧c^2/(3Ho_0^2)=0.311 for H_0t_d=0.05. The cosmic ages are found to be of the order of or larger than 0.6/H_0 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.

• 理論物理学刊行会の論文
• 1987-07-25

著者

• TOMITA Kenji

  Research Institute for Theoretical Physics Hiroshima University

• Tomita K

  Tokyo Development Center Yaskawa Electric Mfg.co. Ltd

• Sugiyama N

  Kyoto Univ. Kyoto Jpn

• Sugiyama Naoshi

  Research Institute For Theoretical Physics Hiroshima University

• Tomita Kenji

  Research Institute For Theoretical Physics Hiroshima Unviersity

• TOMITA Koji

  Tokyo Development Center Yaskawa Electric MFG.Co.,LTD

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