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Dust polarization modelling at large scale over the northern Galactic cap using EBHIS and Planck data

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dc.contributor.author Adak, Debabrata en_US
dc.contributor.author Ghosh, Tuhin en_US
dc.contributor.author Boulanger, Francois en_US
dc.contributor.author Haud, Urmas en_US
dc.contributor.author Kalberla, Peter en_US
dc.contributor.author Martin, Peter G en_US
dc.contributor.author Bracco, Andrea en_US
dc.contributor.author SOURADEEP, TARUN en_US
dc.date.accessioned 2020-09-19T15:00:06Z
dc.date.available 2020-09-19T15:00:06Z
dc.date.issued 2020-08 en_US
dc.identifier.citation Astronomy & Astrophysics, 640. en_US
dc.identifier.issn 0004-6361 en_US
dc.identifier.issn 1432-0746 en_US
dc.identifier.uri http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/5046
dc.identifier.uri https://doi.org/10.1051/0004-6361/201936124 en_US
dc.description.abstract The primary source of systematic uncertainty in the quest for the B-mode polarization of the Cosmic Microwave Background (CMB) introduced by primordial gravitational waves is polarized thermal emission from Galactic dust. Therefore, accurate characterization and separation of the polarized thermal dust emission is an essential step in distinguishing such a faint CMB B-mode signal. We provide a modelling framework to simulate polarized thermal dust emission based on the model described in Ghosh et al. (2017, A&A, 601, A71), making use of both the Planck dust and Effelsberg-Bonn HI surveys over the northern Galactic cap. Our seven-parameter dust model, incorporating both HI gas in three different column density templates as a proxy for spatially variable dust intensity and a phenomenological model of Galactic magnetic field, is able to reproduce both one- and two-point statistics of the observed dust polarization maps seen by Planck at 353 GHz over a selected low-column density region in the northern Galactic cap. This work has important applications in assessing the accuracy of component separation methods and in quantifying the confidence level of separating polarized Galactic emission and the CMB B-mode signal, as is needed for ongoing and future CMB missions. en_US
dc.language.iso en en_US
dc.publisher EDP Sciences en_US
dc.subject Dust, Extinction en_US
dc.subject ISM: magnetic fields en_US
dc.subject Galaxy: general / submillimeter en_US
dc.subject ISM en_US
dc.subject ISM: structure / turbulence en_US
dc.subject 2020 en_US
dc.subject 2020-SEP-WEEK3 en_US
dc.subject TOC-SEP-2020 en_US
dc.title Dust polarization modelling at large scale over the northern Galactic cap using EBHIS and Planck data en_US
dc.type Article en_US
dc.contributor.department Dept. of Physics en_US
dc.identifier.sourcetitle Astronomy & Astrophysics en_US
dc.publication.originofpublisher Foreign en_US


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