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Planck intermediate results. XLI. A map of lensing-induced B-modes

Ade, P. A. R. and Bock, J. J. and Crill, B. P. and Doré, O. and Hildebrandt, S. R. and Rocha, G. and Rusholme, B. (2016) Planck intermediate results. XLI. A map of lensing-induced B-modes. Astronomy and Astrophysics, 596 . Art. No. A102. ISSN 0004-6361. https://resolver.caltech.edu/CaltechAUTHORS:20170202-104324827

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Abstract

The secondary cosmic microwave background (CMB) B-modes stem from the post-decoupling distortion of the polarization E-modes due to the gravitational lensing effect of large-scale structures. These lensing-induced B-modes constitute both a valuable probe of the dark matter distribution and an important contaminant for the extraction of the primary CMB B-modes from inflation. Planck provides accurate nearly all-sky measurements of both the polarization E-modes and the integrated mass distribution via the reconstruction of the CMB lensing potential. By combining these two data products, we have produced an all-sky template map of the lensing-induced B-modes using a real-space algorithm that minimizes the impact of sky masks. The cross-correlation of this template with an observed (primordial and secondary) B-mode map can be used to measure the lensing B-mode power spectrum at multipoles up to 2000. In particular, when cross-correlating with the B-mode contribution directly derived from the Planck polarization maps, we obtain lensing-induced B-mode power spectrum measurement at a significance level of 12σ, which agrees with the theoretical expectation derived from the Planck best-fit Λ cold dark matter model. This unique nearly all-sky secondary B-mode template, which includes the lensing-induced information from intermediate to small (10 ≲ ℓ ≲ 1000) angular scales, is delivered as part of the Planck 2015 public data release. It will be particularly useful for experiments searching for primordial B-modes, such as BICEP2/Keck Array or LiteBIRD, since it will enable an estimate to be made of the lensing-induced contribution to the measured total CMB B-modes.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1051/0004-6361/201527932DOIArticle
http://www.aanda.org/articles/aa/abs/2016/12/aa27932-15/aa27932-15.htmlPublisherArticle
https://arxiv.org/abs/1512.02882arXivDiscussion Paper
ORCID:
AuthorORCID
Ade, P. A. R.0000-0002-5127-0401
Bock, J. J.0000-0002-5710-5212
Crill, B. P.0000-0002-4650-8518
Doré, O.0000-0002-5009-7563
Rocha, G.0000-0002-4150-8076
Rusholme, B.0000-0001-7648-4142
Additional Information:© 2016 ESO. Received 9 December 2015; Accepted 7 September 2016; Published online 12 December 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. This paper made use of the HEALPix software package. We thank the anonymous referee for their helpful comments and thoughtful suggestions that contributed to improve this paper.
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 de Physique Nucléaire et de Physique des Particules (IN2P3)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
Ministry of Economy, Industry and Competitiveness (MINECO)UNSPECIFIED
Junta de AndalucíaUNSPECIFIED
RES (Spain)UNSPECIFIED
Finnish Funding Agency for Technology and Innovation (Tekes)UNSPECIFIED
Academy of FinlandUNSPECIFIED
Finnish IT Center for Science (CSC)UNSPECIFIED
Deutsches Zentrum für Luft- und Raumfahrt (DLR)UNSPECIFIED
Max-Planck-Gesellschaft (MPG)UNSPECIFIED
Canadian Space Agency (CSA)UNSPECIFIED
Institut for Rumforskning og Rumteknologi (DTU Space)UNSPECIFIED
Swiss Space Office (SSO)UNSPECIFIED
Research Council of NorwayUNSPECIFIED
Science Foundation, IrelandUNSPECIFIED
Fundação para a Ciência e a Tecnologia (FCT)UNSPECIFIED
European Research Council (ERC)UNSPECIFIED
PRACE (EU)UNSPECIFIED
Record Number:CaltechAUTHORS:20170202-104324827
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20170202-104324827
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:73985
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:02 Feb 2017 19:09
Last Modified:09 Mar 2020 13:19

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