Power Spectra of CMB Polarization by Scattering in Clusters - Astrophysics > Cosmology and Nongalactic AstrophysicsReport as inadecuate




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Abstract: Mapping CMB polarization is an essential ingredient of current cosmologicalresearch. Particularly challenging is the measurement of an extremely weakB-mode polarization that can potentially yield unique insight on inflation.Achieving this objective requires very precise measurements of the secondarypolarization components on both large and small angular scales. Scattering ofthe CMB in galaxy clusters induces several polarization effects whosemeasurements can probe cluster properties. Perhaps more important are levels ofthe statistical polarization signals from the population of clusters. Powerspectra of five of these polarization components are calculated and comparedwith the primary polarization spectra. These spectra peak at multipoles $\ell\geq 3000$, and attain levels that are unlikely to appreciably contaminate theprimordial polarization signals.



Author: M. Shimon, Y. Rephaeli, S. Sadeh, B. Keating

Source: https://arxiv.org/







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