Astronomy and Astrophysics – Astrophysics
Scientific paper
1993-11-02
Astrophys.J. 429 (1994) 427-433
Astronomy and Astrophysics
Astrophysics
10pages and 4figures compressed uuencoded postscript (with figures), UTAP-93-165
Scientific paper
10.1086/174334
We have performed the most comprehensive predictions of the temperature fluctuations \dtt in the primeval isocurvature baryon models to see whether or not the models are consistent with the recent data on the cosmic microwave background anisotropies. More specifically, we computed the \dtt corresponding to the experimental set-up by the South-Pole and the Owens Valley experiments as well as the COBE satellite. The amplitudes of the predicted \dtt are normalized by means of the COBE 10$^\circ$ data. The resulting constraints on the models are presented on $n - \Omega_b$ plane in the case of $\lambda_0=1-\Omega_b$ (flat models) and $\lambda_0=0$ (open models), where $n$ is the primordial spectral index of entropy fluctuations and $\Omega_b$ is the present baryon density parameter. Our results imply that the PIB models cannot be reconciled with the current observations for any reasonable set of cosmological parameters.
Chiba Takashi
Sugiyama Naoshi
Suto Yasushi
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