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 12 sigma, which agrees with the theoretical expectation derived from the Planck best-fit Lambda cold dark matter model. This unique nearly all-sky secondary B-mode template, which includes the lensing-induced information from intermediate to small (10 less than or similar to l less than or similar to 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.

Ade, P., Aghanim, N., Ashdown, M., Aumont, J., Baccigalupi, C., B, ., et al. (2016). Planck intermediate results XLI. A map of lensing-induced B-modes. ASTRONOMY & ASTROPHYSICS, 596 [10.1051/0004-6361/201527932].

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

Migliaccio, M.;Natoli, P.;
2016-01-01

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 12 sigma, which agrees with the theoretical expectation derived from the Planck best-fit Lambda cold dark matter model. This unique nearly all-sky secondary B-mode template, which includes the lensing-induced information from intermediate to small (10 less than or similar to l less than or similar to 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.
2016
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/05 - ASTRONOMIA E ASTROFISICA
English
cosmology: observations; cosmic background radiation; polarization; gravitational lensing: weak
Ade, P., Aghanim, N., Ashdown, M., Aumont, J., Baccigalupi, C., B, ., et al. (2016). Planck intermediate results XLI. A map of lensing-induced B-modes. ASTRONOMY & ASTROPHYSICS, 596 [10.1051/0004-6361/201527932].
Ade, Par; Aghanim, N; Ashdown, M; Aumont, J; Baccigalupi, C; B, ; Ay, Aj; Barreiro, Rb; Bartolo, N; Basak, S; Battaner, E; Benabed, K; Benoit-Levy, A; Bernard, J-; Bersanelli, M; Bielewicz, P; Bock, Jj; Bonaldi, A; Bonavera, L; Bond, Jr; Borrill, J; Bouchet, Fr; Boulanger, F; Burigana, C; Butler, Rc; Calabrese, E; Cardoso, J-; Catalano, A; Chiang, Hc; Christensen, Pr; Clements, Dl; Colombi, S; Colombo, Lpl; Combet, C; Crill, Bp; Curto, A; Cuttaia, F; Danese, L; Davis, Rj; de Bernardis, P; de Zotti, G; Delabrouille, J; Dickinson, C; Diego, Jm; Dore, O; Ducout, A; Dupac, X; Elsner, F; Ensslin, Ta; Eriksen, Hk; Finelli, F; Forni, O; Frailis, M; Fraisse, Aa; Franceschi, E; Galeotta, S; Galli, S; Ganga, K; Ghosh, T; Giard, M; Giraud-Heraud, Y; Gjerlow, E; Gonzalez-Nuevo, J; Gorski, Km; Gruppuso, A; Gudmundsson, Je; Harrison, Dl; Hern, ; ez-Monteagudo, C; Herranz, D; Hildebr, ; T, Sr; Hornstrup, A; Hovest, W; Hurier, G; Jaffe, Ah; Jones, Wc; Keihanen, E; Keskitalo, R; Kisner, Ts; Knoche, J; Knox, L; Kunz, M; Kurki-Suonio, H; Lagache, G; Lahteenmaki, A; Lamarre, J-; Lasenby, A; Lattanzi, M; Leonardi, R; Levrier, F; Lilje, Pb; Linden-Vornle, M; Lopez-Caniego, M; Lubin, Pm; Macias-Perez, Jf; Maffei, B; Maggie, G; Maino, D; M, ; Olesi, N; Mangilli, A; Maris, M; Martin, Pg; Martinez-Gonzalez, E; Masi, S; Matarrese, S; Meinhold, Pr; Melchiorri, A; Mennella, A; Migliaccio, M; Mitra, S; Miville-Deschenes, M-; Moneti, A; Montier, L; Morgante, G; Mortlock, D; Moss, A; Munshi, D; Murphy, Ja; Naselsky, P; Nati, F; Natoli, P; Netterfield, Cb; Norgaard-Nielsen, Hu; Novikov, D; Novikov, I; Pagano, L; Pajot, F; Paoletti, D; Pasian, F; Patanchon, G; Perdereau, O; Perotto, L; Pettorino, V; Piacentini, F; Piat, M; Pierpaoli, E; Pointecouteau, E; Polenta, G; Pratt, Gw; Rachen, Jp; Reinecke, M; Remazeilles, M; Renault, C; Renzi, A; Ristorcelli, I; Rocha, G; Rosset, C; Rossetti, M; Roudier, G; Rubino-Martin, Ja; Rusholme, B; S, ; Ri, M; Santos, D; Savelainen, M; Savini, G; Scott, D; Spencer, Ld; Stolyarov, V; Stompor, R; Sudiwala, R; Sunyaev, R; Sutton, D; Suur-Uski, A-; Sygnet, J-; Tauber, Ja; Terenzi, L; Toffolatti, L; Tomasi, M; Tristram, M; Tucci, M; Tuovinen, J; Valenziano, L; Valiviita, J; Van Tent, B; Vielva, P; Villa, F; Wade, La; W, ; Elt, Bd; Wehus, Ik; Yvon, D; Zacchei, A; Zonca, A
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/216767
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