The large-scale polarization of the microwave background and foreground

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dc.creatorde Oliveira-Costa, Angelica
dc.creatorTegmark, Max
dc.creatorO'Dell, Chris
dc.creatorKeating, Brian
dc.creatorTimbie, Peter
dc.creatorEfstathiou, George
dc.creatorSmoot, George
dc.date2002-12-19
dc.date2004-08-02
dc.date.accessioned2026-07-07T11:08:09Z
dc.date.available2026-07-07T11:08:09Z
dc.descriptionThe DASI discovery of CMB polarization has opened a new chapter in cosmology. Most of the useful information about inflationary gravitational waves and reionization is on large angular scales where Galactic foreground contamination is the worst, so a key challenge is to model, quantify and remove polarized foregrounds. We use the POLAR experiment, COBE/DMR and radio surveys to provide the strongest limits to date on the TE cross power spectrum of the CMB on large angular scales and to quantify the polarized synchrotron radiation, which is likely to be the most challenging polarized contaminant for the MAP satellite. We find that the synchrotron E- and B-contributions are equal to within 10% from 408-820 MHz with a hint of E-domination at higher frequencies. We quantify Faraday Rotation and Depolarization effects in the two-dimensional (l,nu)-plane and show that they cause the synchrotron polarization percentage to drop both towards lower frequencies and towards lower multipoles.
dc.descriptionTypos fixed to match published version. 12 pages, 10 figs. More foreground info at http://www.hep.upenn.edu/~angelica/foreground.html
dc.identifierhttps://arxiv.org/abs/astro-ph/0212419
dc.identifierhttp://arxiv.org/abs/astro-ph/0212419
dc.identifierPhys.Rev.D68:083003,2003
dc.identifierdoi:10.1103/PhysRevD.68.083003
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/190038
dc.subjectAstrophysics
dc.titleThe large-scale polarization of the microwave background and foreground
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