Microwave Background Anisotropies and the Primordial Spectrum of Cosmological Density Fluctuations
Abstract
Microwave background anisotropies in various cosmological scenarios are studied. In particular, we examine the extent to which nonscaleinvariant spectra of the primodial density fluctuations are consistent with the observational upper limits. The resultant constraints are summarized as contours on (n, {OMEGA})plane, where n is the powerlaw index of the index of the primordial spectrum of density fluctuations and {OMEGA} is the cosmological density parameter. They are compared also with the constraints from the cosmic Mach number test, recently proposed by Ostriker and Suto. The parameter regions which pass both tests are not consistent with the theoretical prejudice inspired by the inflationary model.
 Publication:

The Astrophysical Journal Supplement Series
 Pub Date:
 November 1990
 DOI:
 10.1086/191513
 Bibcode:
 1990ApJS...74..665S
 Keywords:

 Cosmology;
 Microwave Emission;
 Red Shift;
 Relic Radiation;
 Density Distribution;
 Infrared Astronomy Satellite;
 Mach Number;
 Universe;
 Astrophysics;
 COSMIC BACKGROUND RADIATION;
 COSMOLOGY;
 EARLY UNIVERSE