Constraints on a non-Gaussian isocurvature CDM model from high-z objects

Details Constraints on a non-Gaussian isocurvature CDM model from high-z objects Constraints on a non-Gaussian isocurvature CDM model from high-z objects

Dec 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998tx19.confe.520k&link_type=abstract

Abstracts of the 19th Texas Symposium on Relativistic Astrophysics and Cosmology, held in Paris, France, Dec. 14-18, 1998. Eds.:

Astronomy and Astrophysics

Astrophysics

Scientific paper

It is generally accepted that the primeval density fluctuations have gravitationally grown to the present structure of the universe. Many models based on the Gaussian adiabatic fluctuations during inflation have been discussed. Recently an alternative is proposed, that is, the model based on the non-Gaussian(chi^2) isocurvature fluctuations produced by a massive scalar field frozen during inflation. The most notable point of this model is the early objects formation due to its non-Gaussianity. To explore this point, we examine the abundance and its evolution of galaxy clusters and high-z objects such as quasers by extending Press-Schechter theory to the non-Gaussian case. The detailed comparison of the predictions with the observations will be available from the surveys such as 2df and SDSS.

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