Cosmic microwave background probes models of inflation

Richard L. Davis, Hardy M. Hodges, George F. Smoot, Paul J. Steinhardt, Michael S. Turner

Research output: Contribution to journalArticlepeer-review

190 Scopus citations


Inflation creates both scalar (density) and tensor (gravity wave) metric perturbations. We find that the tensor-mode contribution to the cosmic microwave background anisotropy on large-angular 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 power-law inflation models and extreme versions of chaotic inflation). If the tensor mode dominates at large-angular scales, then the value of T/T predicted on 1°is less than if the scalar mode dominates, and, for cold-dark-matter models, bias factors b>1 can be made consistent with Cosmic Background Explorer Differential Microwave Radiometer results.

Original languageEnglish (US)
Pages (from-to)1856-1859
Number of pages4
JournalPhysical review letters
Issue number13
StatePublished - 1992
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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