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Planck intermediate results. XXXVIII. E- and B-modes of dust polarization from the magnetized filamentary structure of the interstellar medium

Ade, P. A. R. and Doré, O. and Helou, G. and Hildebrandt, S. R. and Rocha, G. and Crill, B. P. and Chary, R.-R. and McGehee, P. and Rusholme, B. (2016) Planck intermediate results. XXXVIII. E- and B-modes of dust polarization from the magnetized filamentary structure of the interstellar medium. Astronomy and Astrophysics, 586 . Art. No. A141. ISSN 0004-6361. https://resolver.caltech.edu/CaltechAUTHORS:20190701-115248899

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Abstract

The quest for a B-mode imprint from primordial gravity waves on the polarization of the cosmic microwave background (CMB) requires the characterization of foreground polarization from Galactic dust. We present a statistical study of the filamentary structure of the 353 GHz Planck Stokes maps at high Galactic latitude, relevant to the study of dust emission as a polarized foreground to the CMB. We filter the intensity and polarization maps to isolate filaments in the range of angular scales where the power asymmetry between E-modes and B-modes is observed. Using the Smoothed Hessian Major Axis Filament Finder (SMAFF), we identify 259 filaments at high Galactic latitude, with lengths larger or equal to 2° (corresponding to 3.5 pc in length for a typical distance of 100 pc). Thesefilaments show a preferred orientation parallel to the magnetic field projected onto the plane of the sky, derived from their polarization angles. We present mean maps of the filaments in Stokes I, Q, U, E, and B, computed by stacking individual images rotated to align the orientations of the filaments. Combining the stacked images and the histogram of relative orientations, we estimate the mean polarization fraction of the filaments to be 11%. Furthermore, we show that the correlation between the filaments and the magnetic field orientations may account for the E and B asymmetry and the C_ℓ^(TE)/C_ℓ^(EE) ratio, reported in the power spectra analysis of the Planck353 GHz polarization maps. Future models of the dust foreground for CMB polarization studies will need to take into account the observed correlation between the dust polarization and the structure of interstellar matter.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1051/0004-6361/201526506DOIArticle
https://arxiv.org/abs/1505.02779arXivDiscussion Paper
ORCID:
AuthorORCID
Ade, P. A. R.0000-0002-5127-0401
Doré, O.0000-0002-5009-7563
Helou, G.0000-0003-3367-3415
Rocha, G.0000-0002-4150-8076
Crill, B. P.0000-0002-4650-8518
Chary, R.-R.0000-0001-7583-0621
McGehee, P.0000-0003-0948-6716
Rusholme, B.0000-0001-7648-4142
Additional Information:© 2016 ESO. Article published by EDP Sciences. Received 9 May 2015; Accepted 22 September 2015; Published online 09 February 2016. The Planck Collaboration acknowledges the support of: ESA; CNES, and CNRS/INSU-IN2P3-INP (France); ASI, CNR, and INAF (Italy); NASA and DoE (USA); STFC and UKSA (UK); CSIC, MINECO, JA and RES (Spain); Tekes, AoF, and CSC (Finland); DLR and MPG (Germany); CSA (Canada); DTU Space (Denmark); SER/SSO (Switzerland); RCN (Norway); SFI (Ireland); FCT/MCTES (Portugal); ERC and PRACE (EU). A description of the Planck Collaboration and a list of its members, indicating which technical or scientific activities they have been involved in, can be found at http://www.cosmos.esa.int/web/planck/planck-collaboration. The research leading to these results has received funding from the European Research Council under the European Union’s Seventh Framework Programme (FP7/2007−2013)/ERC grant agreement No. 267934. Some of the results in this paper have been derived using the HEALPix package.
Group:Infrared Processing and Analysis Center (IPAC)
Funders:
Funding AgencyGrant Number
European Space Agency (ESA)UNSPECIFIED
Centre National d'Études Spatiales (CNES)UNSPECIFIED
Centre National de la Recherche Scientifique (CNRS)UNSPECIFIED
Institut National des Sciences de l'Univers (INSU)UNSPECIFIED
Agenzia Spaziale Italiana (ASI)UNSPECIFIED
Consiglio Nazionale delle Ricerche (CNR)UNSPECIFIED
Istituto Nazionale di Astrofisica (INAF)UNSPECIFIED
NASAUNSPECIFIED
Department of Energy (DOE)UNSPECIFIED
Science and Technology Facilities Council (STFC)UNSPECIFIED
United Kingdom Space Agency (UKSA)UNSPECIFIED
Consejo Superior de Investigaciones Científicas (CSIC)UNSPECIFIED
Ministerio de Economía, Industria y Competitividad (MINECO) UNSPECIFIED
Junta de AndalucíaUNSPECIFIED
Spanish Supercomputing Network (RES)UNSPECIFIED
Finnish Ministry of Employment and the EconomyUNSPECIFIED
Academy of FinlandUNSPECIFIED
Finnish IT Center for Science (CSC)UNSPECIFIED
Deutsches Zentrum für Luft- und Raumfahrt (DLR)UNSPECIFIED
Max Planck SocietyUNSPECIFIED
Canadian Space Agency (CSA)UNSPECIFIED
DTU Space (Denmark)UNSPECIFIED
State Secretariat for Education and Research (Switzerland)UNSPECIFIED
Swiss Space Office (SSO)UNSPECIFIED
Research Council of NorwayUNSPECIFIED
Science Foundation, IrelandUNSPECIFIED
Fundação para a Ciência e a Tecnologia (FCT)UNSPECIFIED
Ministério da Ciência, Tecnologia e Ensino Superior (MCTES) UNSPECIFIED
European Research Council (ERC)267934
Partnership for Advanced Computing in Europe (PRACE)UNSPECIFIED
Subject Keywords:polarization – galaxies: ISM – submillimeter: ISM – ISM: general
Record Number:CaltechAUTHORS:20190701-115248899
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20190701-115248899
Official Citation:Planck intermediate results - XXXVIII. E- and B-modes of dust polarization from the magnetized filamentary structure of the interstellar medium. Planck Collaboration, P. A. R. Ade, et. al. A&A, 586 (2016) A141. DOI: https://doi.org/10.1051/0004-6361/201526506
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:96864
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:02 Jul 2019 18:58
Last Modified:09 Mar 2020 13:19

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