1992/07/13 by R. L. Davis, Richard L. Davis, H. M. Hodges +7 · 3 citations
Earth and Planetary Sciences · Physics and Astronomy · #Anisotropy #Astrophysics #Black Holes and Theoretical Physics #Cosmic background radiation #Cosmic microwave background #Cosmology #Cosmology and Gravitation Theories #Dark matter #Geophysics and Gravity Measurements #Inflation (cosmology) #Physics #Quantum mechanics #Scalar (mathematics) #Spectral density #Statistics #astro-ph #hep-ph
paper · pdf · doi:10.1103/physrevlett.69.1856
published as Phys.Rev.Lett.69:1856-1859,1992; ERRATUM-ibid.70:1733,1993 · 12 pages, FERMILAB-Pub-92/168-A
arxiv created 1992/07/13 · openalex publication_date 1992/09/28 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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 \ensuremathΔT/T predicted on 1\ifmmode^∘\else\textdegree\fi 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.