Work

CBR anisotropy and the running of the scalar spectral index

Year: 1995

Type: article

Abstract: Accurate (\ensuremath{\lesssim}1%) predictions for the anisotropy of the cosmic background radiation (CBR) are essential for using future high-resolution (\ensuremath{\lesssim}1\ifmmode^\circ\else\textdegree\fi{}) CBR maps to test cosmological models. In many inflationary models the variation (``running'') of the spectral index of the spectrum of density perturbations is a significant effect and leads to changes of around 1--10 % in the CBR power spectrum. We propose a general method for taking running into account which uses the derivative of the spectral index (dn/dlnk). Conversely, high-resolution CBR maps may be able to determine dn/dlnk, giving important information about the inflationary potential.

Source: Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields

DOI: 10.1103/physrevd.52.r1739

Authors: Arthur Kosowsky, Michael S. Turner

Institutions: Harvard University, Center for Astrophysics Harvard & Smithsonian, Fermi National Accelerator Laboratory, University of Chicago

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: U.S. Department of Energy, National Aeronautics and Space Administration, Society of Fellows, Harvard University, Fermilab

OpenAlex ID: W2149553431

FWCI: 4.333

Cites: 13

Cited by: 284

Related to: 10