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Challinor, Anthony; Allison, Rupert; Carron, Julien; Errard, Josquin; Feeney, Stephen; Kitching, Thomas; Lesgourgues, Julien; Lewis, Antony; Zubeldía, Íñigo; Achucarro, Ana; Ade, Peter; Ashdown, Mark; Ballardini, Mario; Banday, A J; Banerji, Ranajoy; Bartlett, James; Bartolo, Nicola; Basak, Soumen; Baumann, Daniel; Bonaldi, Anna; Borrill, Julian; Bouchet, François; Boulanger, François; Brinckmann, Thejs; Burigana, Carlo; Buzzelli, Alessandro; Zhen-Yi Cai; Calvo, Martino; Carla-Sofia Carvalho; Clesse, Sebastien; Colantoni, Ivan; Coppolecchia, Alessandro; d'Alessandro, Giuseppe; de Bernardis, Paolo; de Gasperis, Giancarlo; De Zotti, Gianfranco; Delabrouille, Jacques; Eleonora Di Valentino; Jose-Maria, Diego; Fernandez-Cobos, Raul; Ferraro, Simone; Finelli, Fabio; astieri, Francesco; Galli, Silvia; Genova-Santos, Ricardo; Gerbino, Martina; González-Nuevo, Joaquin; Greenslade, Joshua; Hagstotz, Steffen; Hanany, Shaul; Handley, Will; Hernandez-Monteagudo, Carlos; Hervías-Caimapo, Carlos; Hills, Matthew; Hivon, Eric; Kiiveri, Kimmo; Kisner, Ted; Kunz, Martin; Kurki-Suonio, Hannu; Lasenby, Anthony; Lattanzi, Massimiliano; Liguori, Michele; Lindholm, Valtteri; López-Caniego, Marcos; Luzzi, Gemma; Maffei, Bruno; Martinez-González, Enrique; C J A P Martins; Masi, Silvia; McCarthy, Darragh; Melchiorri, Alessandro; Melin, Jean-Baptiste; Monfardini, Alessandro; Natoli, Paolo; Negrello, Mattia; Notari, Alessio; Paiella, Alessandro; Paoletti, Daniela; Patanchon, Guillaume; Piat, Michel; Pisano, Giampaolo; Polastri, Linda; Pollo, Agnieszka; Poulin, Vivian; Quartin, Miguel; Roman, Matthieu; Rubino-Martin, Jose-Alberto; Salvati, Laura; Tomasi, Maurizio; Tramonte, Denis; Trappe, Neil; Trombetti, Tiziana; Tucker, Carole; Valiviita, Jussi; Rien Van de Weijgaert; Bartjan van Tent; Vennin, Vincent; Vielva, Patricio; Young, Karl; the CORE Collaboration
arXiv.org, 07/2017Paper, Journal Article
Lensing of the CMB is now a well-developed probe of large-scale clustering over a broad range of redshifts. By exploiting the non-Gaussian imprints of lensing in the polarization of the CMB, the CORE mission can produce a clean map of the lensing deflections over nearly the full-sky. The number of high-S/N modes in this map will exceed current CMB lensing maps by a factor of 40, and the measurement will be sample-variance limited on all scales where linear theory is valid. Here, we summarise this mission product and discuss the science that it will enable. For example, the summed mass of neutrinos will be determined to an accuracy of 17 meV combining CORE lensing and CMB two-point information with contemporaneous BAO measurements, three times smaller than the minimum total mass allowed by neutrino oscillations. In the search for B-mode polarization from primordial gravitational waves with CORE, lens-induced B-modes will dominate over instrument noise, limiting constraints on the gravitational wave power spectrum amplitude. With lensing reconstructed by CORE, one can "delens" the observed polarization internally, reducing the lensing B-mode power by 60%. This improves to 70% by combining lensing and CIB measurements from CORE, reducing the error on the gravitational wave amplitude by 2.5 compared to no delensing (in the null hypothesis). Lensing measurements from CORE will allow calibration of the halo masses of the 40000 galaxy clusters that it will find, with constraints dominated by the clean polarization-based estimators. CORE can accurately remove Galactic emission from CMB maps with its 19 frequency channels. We present initial findings that show that residual Galactic foreground contamination will not be a significant source of bias for lensing power spectrum measurements with CORE. abridged
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