Gravitational waves and the polarization of the cosmic microwave background

Frewin, Richard Arthur, Polnarev, A. G. and Coles, P. 1994. Gravitational waves and the polarization of the cosmic microwave background. Monthly Notices of the Royal Astronomical Society 266 (1) , L21-L26.

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Abstract

We discuss the influence of gravitational waves (Gws) upon the polarization of the cosmic microwave background (CMB) radiation. We show how to compute the rms temperature anisotropy and polarization of the CMB radiation induced by GWs of arbitrary wavelength. We find that the ratio of polarization, Π Π , to anisotropy, A, can be as large as ∼40 ∼40 per cent, but is sensitively dependent upon the GW spectrum and the cosmological ionization history. We argue that CMB radiation polarization measurements can provide useful constraints on cosmological models.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Uncontrolled Keywords:	gravitation, polarization, non-thermal radiation mechanism, cosmic microwave background, cosmology: theory, early Universe
Publisher:	Oxford University Press
ISSN:	0035-8711
Date of Acceptance:	28 October 1993
Last Modified:	13 Oct 2017 12:23
URI:	https://orca.cardiff.ac.uk/id/eprint/104952

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