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Article overview
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Small-Scale Cosmic Microwave Background Polarization from Reionization | Daniel Baumann
; Asantha Cooray
; Marc Kamionkowski
; | Date: |
28 Aug 2002 | Journal: | New Astron. 8 (2003) 565-573 | Subject: | astro-ph | Affiliation: | Cambridge), Asantha Cooray, Marc Kamionkowski (Caltech | Abstract: | We discuss fluctuations in the cosmic microwave background (CMB) polarization due to scattering from reionized gas at low redshifts. Polarization is produced by re-scattering of the primordial temperature anisotropy quadrupole and of the kinematic quadrupole that arises from gas motion transverse to the line of sight. We show that both effects produce equal E- and B-parity polarization, and are, in general, several orders of magnitude below the dominant polarization contributions at the last scattering surface to E-modes or the gravitational-lensing contribution to B-modes at intermediate redshifts. These effects are also several orders of magnitude below the B polarization due to lensing even after subtraction with higher-order correlations, and are thus too small to constitute a background for searches for the polarization signature of inflationary gravitational waves. | Source: | arXiv, astro-ph/0208511 | Services: | Forum | Review | PDF | Favorites |
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