Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993mnras.265..507p&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Vol. 265, NO. 2/NOV15, P. 507, 1993
Astronomy and Astrophysics
Astronomy
35
Cosmology: Observations - Cosmology: Theory - Dark Matter - Large-Scale Structure Of Universe
Scientific paper
A mixed cold-hot cosmological model with inflationary initial conditions (Ωtot = 1 and the flat, n = 1, spectrum of initial adiabatic perturbations) is compared with recent observational data. Results of the COBE Δ T/T experiment are used to fix the normalization of the spectrum. The main restrictions on the model come from the clustering of galaxies at large scales, the value of the biasing parameter b for galaxies at R=16(50/H0) Mpc and the conditions for quasar and galaxy formation. Under the most conservative assumptions (and neglecting some tests), only a small region in the H0-ΩV plane with H0 < 60 km s-1 Mpc-1, 0.1 ≤ ΩV ≤ 0.3 remains allowed (for H0=50, 0.17 ≤ ΩV ≤ 0.28 is permitted). Natural additional requirements that b ≥ 1.7 and that large galaxies (M ˜ 1012 Msun) formed at redshifts z ≥ 1 leave practically no allowed region for H0 ≥ 40. Therefore the HDM+CDM model is only marginally consistent with observations.
Pogosoyan D. Y.
Starobinsky Alexei A.
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