Building the cosmic spectrum in open cosmologies.

Details Building the cosmic spectrum in open cosmologies. Building the cosmic spectrum in open cosmologies.

Jul 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998ncimb.113..947f&link_type=abstract

Nuovo Cimento B, Vol. 113B, No. 7, p. 947 - 951

Mathematics

Logic

1

Cosmological Models: Density Waves, Cosmological Models: Inhomogeneities, Cosmological Models: Perturbations

Scientific paper

The authors show how a recent method, aimed at extracting the large-scale spectrum of cosmic inhomogeneities from the cosmic-background anisotropies without making a priori assumptions on its shape, can be extended to linear perturbations of any kind in cosmologies with arbitrary density parameter and cosmological constant. Applying the method to density waves in open models, from COBE-DMR's data one finds steep spectra at low cosmic densities, e.g. n = 1.91±0.47 for Ω0 = 0.3.

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