Implications of a Class of Grand-Unified Theories for Large-Scale Structure in the Universe
Abstract
We consider a class of grand-unified theories in which cosmologically significant axion and neutrino energy densities arise naturally. To obtain large-scale structure we consider (1) an inflationary scenario, (2) inflation followed by string production, and (3) a noninflationary scenario with density fluctuations caused solely by strings. We show that inflation may be compatible with the recent observational indications that Ω<1 on the scale of superclusters, particularly if strings are present.
- Publication:
-
Physical Review Letters
- Pub Date:
- September 1984
- DOI:
- 10.1103/PhysRevLett.53.1292
- Bibcode:
- 1984PhRvL..53.1292S
- Keywords:
-
- Big Bang Cosmology;
- Galactic Clusters;
- Galactic Evolution;
- Neutrinos;
- Unified Field Theory;
- Density Distribution;
- Elementary Particle Interactions;
- Mass To Light Ratios;
- Particle Mass;
- Astrophysics;
- 98.80.Bp;
- 12.10.En;
- Origin and formation of the Universe