Gravitational Waves and the Polarisation of the Cosmic Microwave Background
arXiv:astro-ph/9310045 · doi:10.1093/mnras/266.1.L21
Abstract
We discuss the influence of gravitational waves (GWs) upon the polarisation of the Cosmic Microwave Background Radiation (CMBR). We show how to compute the {\em rms} temperature anisotropy and polarisation of the CMBR induced by GWs of arbitrary wavelength. We find that the ratio of polarisation, $Î $, to anisotropy, $A$, can be as large as $\sim 40$\%, but is sensitively dependent upon the GW spectrum and the cosmological ionisation history. We argue that CMBR polarisation measurements can provide useful constraints on cosmological models.
5 pages, LaTex, QMW-astro-ph/yymmnnn