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Cosmic microwave background probes models of inflation

Year: 1992
Type: article
Abstract: 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 \ensuremath{\Delta}T/T predicted on 1\ifmmode^\circ\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.
DOI: 10.1103/physrevlett.69.1856
Institutions: Fermi National Accelerator Laboratory, Lawrence Berkeley National Laboratory, University of Chicago, Center for Astrophysics Harvard & Smithsonian, Space Sciences Laboratory, University of Pennsylvania, University of California, Berkeley
Language: English
Open Access status: green
Funders: National Science Foundation, U.S. Department of Energy, National Aeronautics and Space Administration, University of Pennsylvania, Smithsonian Astrophysical Observatory, Fermilab
OpenAlex ID: W1969575420
FWCI: 56.72
Cites: 20
Cited by: 188
Related to: 10