Consequences of the COBE satellite results for the inflationary scenario
Abstract
The discovery of the microwave background anisotropy by the Cosmic Background Explorer (COBE) satellite is in accord with the inflationary scenario. For five promising models involving a single scalar field, the coupling constants and the fluctuation spectra are calculated including a correction for gravitational radiation. The primordial density fluctuation spectrum computed from these models is not exactly scale-invariant; the spectral index is constrained to be n>~0.8 for inflation with an exponential potential (assuming that the biasing parameter for galaxies bρ<2). The implications for biased galaxy formation scenarios are discussed.
- Publication:
-
Physical Review Letters
- Pub Date:
- December 1992
- DOI:
- 10.1103/PhysRevLett.69.3602
- Bibcode:
- 1992PhRvL..69.3602S
- Keywords:
-
- Cosmic Background Explorer Satellite;
- Dark Matter;
- Gravitational Effects;
- Relic Radiation;
- Astronomical Models;
- Spaceborne Astronomy;
- Astrophysics;
- 98.70.Vc;
- 04.30.+x;
- 98.80.Cq;
- Background radiations;
- Particle-theory and field-theory models of the early Universe