Authors
R Adam, N Aghanim, Mark Ashdown, J Aumont, Carlo Baccigalupi, Mario Ballardini, AJ Banday, RB Barreiro, N Bartolo, Suman Basak, R Battye, K Benabed, J-P Bernard, M Bersanelli, P Bielewicz, JJ Bock, A Bonaldi, L Bonavera, JR Bond, J Borrill, FR Bouchet, F Boulanger, M Bucher, CARLO Burigana, Erminia Calabrese, J-F Cardoso, J Carron, HC Chiang, LPL Colombo, C Combet, Barbara Comis, F Couchot, A Coulais, BP Crill, A Curto, Francesco Cuttaia, RJ Davis, Paolo de Bernardis, A De Rosa, Giulia De Zotti, J Delabrouille, Eleonora Di Valentino, C Dickinson, JM Diego, O Doré, M Douspis, A Ducout, X Dupac, F Elsner, TA Enßlin, HK Eriksen, E Falgarone, Y Fantaye, FABIO Finelli, F Forastieri, Marco Frailis, AA Fraisse, E Franceschi, A Frolov, Samuele Galeotta, S Galli, K Ganga, RICARDO T Génova-Santos, Martina Gerbino, T Ghosh, J González-Nuevo, Krzysztof M Górski, ALESSANDRO Gruppuso, Jón E Gudmundsson, Frode Kristian Hansen, G Helou, S Henrot-Versillé, D Herranz, E Hivon, Z Huang, S Ilić, AH Jaffe, William C Jones, Elina Keihänen, R Keskitalo, TS Kisner, L Knox, N Krachmalnicoff, M Kunz, Hannu Kurki-Suonio, G Lagache, A Lähteenmäki, J-M Lamarre, M Langer, A Lasenby, Massimiliano Lattanzi, CR Lawrence, M Le Jeune, F Levrier, A Lewis, M Liguori, Per Barth Lilje, M López-Caniego, Y-Z Ma, JF Macias-Perez, G Maggio, A Mangilli, Michele Maris, PG Martin, E Martinez-Gonzalez, S Matarrese, N Mauri, JD McEwen, PR Meinhold, Alessandro Melchiorri, Aniello Mennella, M Migliaccio, M-A Miville-Deschenes, D Molinari, A Moneti, L Montier, GIANLUCA Morgante, A Moss, P Naselsky, P Natoli, Carol Anne Oxborrow, Luca Pagano, DANIELA Paoletti, B Partridge, G Patanchon, L Patrizii, O Perdereau, L Perotto, V Pettorino, Francesco Piacentini, S Plaszczynski, L Polastri, Gianluca Polenta, J-L Puget, JP Rachen, Benjamin Racine, M Reinecke, M Remazeilles, A Renzi, G Rocha, MARIACHIARA Rossetti, G Roudier, JOSE ALBERTO Rubiño-Martín, B Ruiz-Granados, Laura Salvati, MAURA Sandri, M Savelainen, D Scott, G Sirri, R Sunyaev
Publication date
2016/12/1
Journal
Astronomy & Astrophysics
Volume
596
Pages
A108
Publisher
EDP sciences
Description
We investigate constraints on cosmic reionization extracted from the Planck cosmic microwave background (CMB) data. We combine the Planck CMB anisotropy data in temperature with the low-multipole polarization data to fit ΛCDM models with various parameterizations of the reionization history. We obtain a Thomson optical depth τ = 0.058 ± 0.012 for the commonly adopted instantaneous reionization model. This confirms, with data solely from CMB anisotropies, the low value suggested by combining Planck 2015 results with other data sets, and also reduces the uncertainties. We reconstruct the history of the ionization fraction using either a symmetric or an asymmetric model for the transition between the neutral and ionized phases. To determine better constraints on the duration of the reionization process, we also make use of measurements of the amplitude of the kinetic Sunyaev-Zeldovich (kSZ) effect using …
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