Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996apl%26c..33..119m&link_type=abstract
Astrophysical Letters and Communications, Vol. 33, Nos. 1 - 5, p. 119 - 125
Astronomy and Astrophysics
Astrophysics
Universe: Large-Scale Structure, Universe: Dark Matter, Universe: Galaxy Clustering, N-Body Simulations: Cosmology
Scientific paper
Recently, there has been growing interest on primordial "blue" (n > 1) perturbation spectra, motivated both by a composite set of observational data on large scales (CMB anisotropies, bulk flows, etc.), and from the point of view of theoretical model building (e.g. hybrid inflation). In order to put some observational constraints on this type of spectra, both in the frame of purely Cold Dark Matter (CDM) and in Mixed Dark Matter (MDM) scenarios, the authors run N-body simulations and they study the spatial clustering properties and the peculiar velocities. The main results show that a blue MDM model can reproduce the APM-Stromlo variance of count-in-cells and the POTENT bulk flows; on the contraray, a pure CDM model with blue primordial spectrum produces too small-scale power.
Colafrancesco Sergio
de Gasperis Giancarlo
Lucchin Francesco
Matarrese Sabino
Mei Shan
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