Planck 2018 results. XI. Polarized dust foregrounds

Calabrese, Erminia ORCID: https://orcid.org/0000-0003-0837-0068 2020. Planck 2018 results. XI. Polarized dust foregrounds. Astronomy and Astrophysics 641 , A11. 10.1051/0004-6361/201832618

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Abstract

The study of polarized dust emission has become entwined with the analysis of the cosmic microwave background (CMB) polarization in the quest for the curl-like B-mode polarization from primordial gravitational waves and the low-multipole E-mode polarization associated with the reionization of the Universe. We used the new Planck PR3 maps to characterize Galactic dust emission at high latitudes as a foreground to the CMB polarization and use end-to-end simulations to compute uncertainties and assess the statistical significance of our measurements.We present Planck EE, BB, and TE power spectra of dust polarization at 353 GHz for a set of six nested high-Galactic-latitude sky regions covering from 24 to 71% of the sky. We present power-law fits to the angular power spectra, yielding evidence for statistically significant variations of the exponents over sky regions and a di�erence between the values for the EE and BB spectra, which for the largest sky region are �EE =

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Publisher:	EDP Sciences
ISSN:	0004-6361
Date of First Compliant Deposit:	17 June 2019
Date of Acceptance:	14 September 2018
Last Modified:	02 May 2023 17:28
URI:	https://orca.cardiff.ac.uk/id/eprint/119889

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