Cosmic Microwave Background Probes Models of Inflation

Details Cosmic Microwave Background Probes Models of Inflation Cosmic Microwave Background Probes Models of Inflation

1992-07-13

arxiv.org/abs/astro-ph/9207001v1

Phys.Rev.Lett.69:1856-1859,1992; ERRATUM-ibid.70:1733,1993

Astronomy and Astrophysics

Astrophysics

12 pages, FERMILAB-Pub-92/168-A

Scientific paper

10.1103/PhysRevLett.69.1856

Inflation creates both scalar (density) and tensor (gravity wave) metric perturbations. We find that the tensor mode contribution to the CMB 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 $\Delta T/T$ predicted on $1^\circ$ is less than if the scalar mode dominates, and, for cold dark matter models, $b>1$ can be made consistent with the COBE DMR results.

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