Cosmic microwave background probes models of inflation
Abstract
Inflation creates both scalar (density) and tensor (gravity wave) metric perturbations. We find that the tensormode contribution to the cosmic microwave background anisotropy on largeangular scales can only exceed that of the scalar mode in models where the spectrum of perturbations deviates significantly from scale invariance (e.g., extended and powerlaw inflation models and extreme versions of chaotic inflation). If the tensor mode dominates at largeangular scales, then the value of ∆T/T predicted on 1° is less than if the scalar mode dominates, and, for colddarkmatter models, bias factors b>1 can be made consistent with Cosmic Background Explorer Differential Microwave Radiometer results.
 Publication:

Physical Review Letters
 Pub Date:
 September 1992
 DOI:
 10.1103/PhysRevLett.69.1856
 arXiv:
 arXiv:astroph/9207001
 Bibcode:
 1992PhRvL..69.1856D
 Keywords:

 Background Radiation;
 Cosmic Background Explorer Satellite;
 Dark Matter;
 Gravity Waves;
 Interstellar Radiation;
 Microwave Spectra;
 Anisotropy;
 Big Bang Cosmology;
 Microwave Radiometers;
 Power Spectra;
 Tensors;
 Space Radiation;
 98.70.Vc;
 04.30.+x;
 98.80.Cq;
 Background radiations;
 Particletheory and fieldtheory models of the early Universe;
 Astrophysics;
 High Energy Physics  Phenomenology
 EPrint:
 12 pages, FERMILABPub92/168A