Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993mnras.262l..43s&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 262, no. 3, p. L43-L47.
Astronomy and Astrophysics
Astronomy
Anisotropic Media, Cosmic Background Explorer Satellite, Galactic Clusters, Relic Radiation, Astronomical Models, Gravitational Waves, Microwaves
Scientific paper
The detection of a large-angle anisotropy in the cosmic MW background made on the basis of recent results from the COBE DMR experiment is reported. These data indicate that the scale-invariant (n = 1) spectrum is preferred, with an amplitude at the horizon crossing of (5.4 +/- 1.6) x 10 exp -6. It is argued that on very large scales the peculiar gravitational potential has been nearly constant from the epoch of the last scattering to the present. It is suggested that we live in a spatially flat universe of critical density, where optical galaxies are mildly biased with respect to the matter distribution, and with a power spectrum which, depending on the spectral index on small scales, has a turnover to n = 1 in the 100-200/h Mpc scale range.
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