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Confrontation of a double inflationary cosmological model with observations
Gottloeber, Stefan; Muecket, Jan P.; Starobinsky, Alexei A.
AA(Astrophysikalisches Institut Potsdam, Potsdam, Germany), AB(Astrophysikalisches Institut Potsdam, Potsdam, Germany), AC(Landau Institute for Theoretical Physics, Moscow, Russia)
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 434, no. 2, p. 417-423 (ApJ Homepage)
Publication Date:
NASA/STI Keywords:
Astronomical Models, Computerized Simulation, Cosmology, Dark Matter, Inflating, Spectra, Cosmic Background Explorer Satellite, Galactic Clusters, Galactic Evolution, Mach Number, Quasars, Sky Surveys (Astronomy)
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Cold dark matter (CDM) models with non-scale-free steplike spectra of adiabatic perturbations produced in a realistic double inflationary model are compared with recent observational data. The model contains two additional free parameters relative to the standard CDM model with the flat (n = 1) initial spectrum. Results of the Cosmic Background Explorer (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 cell,' 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 restrict allowed values for the two remaining model parameters. However, a nonempty region for them satisfying all considered tests is found.

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