Confrontation of a Double Inflationary Cosmological Model with Observations

Details Confrontation of a Double Inflationary Cosmological Model with Observations Confrontation of a Double Inflationary Cosmological Model with Observations

1993-09-29

arxiv.org/abs/astro-ph/9309049v1

Astrophys.J.434:417-423,1994

Astronomy and Astrophysics

Astrophysics

17 pages and 4 figures obtainable by request, LaTex, AIP 93-11

Scientific paper

10.1086/174743

CDM models with non-scale-free step-like spectra of adiabatic perturbations produced in a realistic double inflationary model are compared with recent observational data. The model contains two additional free parameters relatively to the standard CDM model with the flat ($n=1$) initial spectrum. Results of the COBE experiment are used for the determination of a free overall spectrum normalization. Then predictions for the galaxy biasing parameter, the variance for "counts in cells", the galaxy angular correlation function, bulk flow peculiar velocities and the Mach number test are obtained. Also considered are conditions for galaxy and quasar formation. Observational data strongly restricts allowed values for the two remaining model parameters. However, a non-empty region for them satisfying all considered tests is found.

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