Planck intermediate results: XLVII. Planck constraints on reionization history
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 obta...
Published in: | Astronomy & Astrophysics |
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Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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EDP Sciences
2017
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Online Access: | http://hdl.handle.net/10852/55320 http://urn.nb.no/URN:NBN:no-58114 https://doi.org/10.1051/0004-6361/201628897 |
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Universitet i Oslo: Digitale utgivelser ved UiO (DUO) |
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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 additional information from the high-resolution Atacama Cosmology Telescope and South Pole Telescope experiments. The average redshift at which reionization occurs is found to lie between z = 7.8 and 8.8, depending on the model of reionization adopted. Using kSZ constraints and a redshift-symmetric reionization model, we find an upper limit to the width of the reionization period of Δz < 2.8. In all cases, we find that the Universe is ionized at less than the 10% level at redshifts above z ≃ 10. This suggests that an early onset of reionization is strongly disfavoured by the Planck data. We show that this result also reduces the tension between CMB-based analyses and constraints from other astrophysical sources. |
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Article in Journal/Newspaper |
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Adam, R. Aghanim, N. Ashdown, M. Aumont, J. Baccigalupi, C. Ballardini, M. Banday, A. J. Barreiro, R. B. Bartolo, N. Basak, S. Battye, R. Benabed, K. Bernard, J.-P. Bersanelli, M. Bielewicz, P. Bock, J. J. Bonaldi, A. Bonavera, L. Bond, J. R. Borrill, J. Bouchet, F. R. Boulanger, F. Bucher, M. Burigana, C. Calabrese, E. Cardoso, J.-F. Carron, J. Chiang, H. C. Colombo, L. P. L. Combet, C. Comis, B. Couchot, F. Coulais, A. Crill, B. P. Curto, A. Cuttaia, F. Davis, R. J. de Bernardis, P. de Rosa, A. de Zotti, G. Delabrouille, J. Di Valentino, E. Dickinson, C. Diego, J. M. Doré, O. Douspis, M. Ducout, A. Dupac, X. Elsner, F. Enßlin, T. A. Eriksen, Hans Kristian Kamfjord Falgarone, E. Fantaye, Yabebal Tadesse Finelli, F. Forastieri, F. Frailis, M. Fraisse, A. A. Franceschi, E. Frolov, A Galeotta, S. Galli, S. Ganga, K. Génova-Santos, R. T. Gerbino, M Ghosh, T. González-Nuevo, J. Górski, Krzysztof M. Gruppuso, A. Gudmundsson, J. E. Hansen, Frode Kristian Helou, G. Henrot-Versillé, S. Herranz, D. Hivon, E. Huang, Z. Ilic, S. Jaffe, A. H. Jones, W. C. Keihänen, Elina Keskitalo, R. Kisner, T. S. Knox, L. Krachmalnicoff, N. Kunz, M. Kurki-Suonio, Hannu Lagache, G Lähteenmäki, A. Lamarre, J.-M. Langer, M Lasenby, A Lattanzi, M Lawrence, C. R. Le Jeune, M Levrier, F. Lewis, A Liguori, M. Lilje, Per Barth López-Caniego, M. Ma, Y.-Z. Macías-Pérez, J. F. Maggio, G. Mangilli, A Maris, M. Martin, P. G. Martínez-González, E. Matarrese, S. Mauri, N. McEwen, J. D. Meinhold, P. R. Melchiorri, A Mennella, A Migliaccio, M. Miville-Deschênes, M.-A. Molinari, D Moneti, A Montier, L Morgante, G Moss, A. Naselsky, P. Natoli, P Oxborrow, C. A. Pagano, L. Paoletti, D. Partridge, B Patanchon, G. Patrizii, L Perdereau, O Perotto, L Pettorino, V. Piacentini, F Plaszczynski, S Polastri, L Polenta, G Puget, J.-L. Rachen, J. P. Racine, Benjamin Reinecke, M. Remazeilles, M. Renzi, A Rocha, G. Rossetti, M. Roudier, G. Rubiño-Martín, J. A. Ruiz-Granados, B. Salvati, L Sandri, M Savelainen, M. Scott, D Sirri, G. Sunyaev, R Suur-Uski, A.-S. Tauber, J. A. Tenti, M. Toffolatti, L. Tomasi, M. Tristram, M. Trombetti, T Väliviita, Jussi-Pekka Van Tent, F Vielva, P. Villa, F. Vittorio, N. Wandelt, B. D. Wehus, Ingunn Kathrine White, M. Zacchei, A Zonca, A. |
spellingShingle |
Adam, R. Aghanim, N. Ashdown, M. Aumont, J. Baccigalupi, C. Ballardini, M. Banday, A. J. Barreiro, R. B. Bartolo, N. Basak, S. Battye, R. Benabed, K. Bernard, J.-P. Bersanelli, M. Bielewicz, P. Bock, J. J. Bonaldi, A. Bonavera, L. Bond, J. R. Borrill, J. Bouchet, F. R. Boulanger, F. Bucher, M. Burigana, C. Calabrese, E. Cardoso, J.-F. Carron, J. Chiang, H. C. Colombo, L. P. L. Combet, C. Comis, B. Couchot, F. Coulais, A. Crill, B. P. Curto, A. Cuttaia, F. Davis, R. J. de Bernardis, P. de Rosa, A. de Zotti, G. Delabrouille, J. Di Valentino, E. Dickinson, C. Diego, J. M. Doré, O. Douspis, M. Ducout, A. Dupac, X. Elsner, F. Enßlin, T. A. Eriksen, Hans Kristian Kamfjord Falgarone, E. Fantaye, Yabebal Tadesse Finelli, F. Forastieri, F. Frailis, M. Fraisse, A. A. Franceschi, E. Frolov, A Galeotta, S. Galli, S. Ganga, K. Génova-Santos, R. T. Gerbino, M Ghosh, T. González-Nuevo, J. Górski, Krzysztof M. Gruppuso, A. Gudmundsson, J. E. Hansen, Frode Kristian Helou, G. Henrot-Versillé, S. Herranz, D. Hivon, E. Huang, Z. Ilic, S. Jaffe, A. H. Jones, W. C. Keihänen, Elina Keskitalo, R. Kisner, T. S. Knox, L. Krachmalnicoff, N. Kunz, M. Kurki-Suonio, Hannu Lagache, G Lähteenmäki, A. Lamarre, J.-M. Langer, M Lasenby, A Lattanzi, M Lawrence, C. R. Le Jeune, M Levrier, F. Lewis, A Liguori, M. Lilje, Per Barth López-Caniego, M. Ma, Y.-Z. Macías-Pérez, J. F. Maggio, G. Mangilli, A Maris, M. Martin, P. G. Martínez-González, E. Matarrese, S. Mauri, N. McEwen, J. D. Meinhold, P. R. Melchiorri, A Mennella, A Migliaccio, M. Miville-Deschênes, M.-A. Molinari, D Moneti, A Montier, L Morgante, G Moss, A. Naselsky, P. Natoli, P Oxborrow, C. A. Pagano, L. Paoletti, D. Partridge, B Patanchon, G. Patrizii, L Perdereau, O Perotto, L Pettorino, V. Piacentini, F Plaszczynski, S Polastri, L Polenta, G Puget, J.-L. Rachen, J. P. Racine, Benjamin Reinecke, M. Remazeilles, M. Renzi, A Rocha, G. Rossetti, M. Roudier, G. Rubiño-Martín, J. A. Ruiz-Granados, B. Salvati, L Sandri, M Savelainen, M. Scott, D Sirri, G. Sunyaev, R Suur-Uski, A.-S. Tauber, J. A. Tenti, M. Toffolatti, L. Tomasi, M. Tristram, M. Trombetti, T Väliviita, Jussi-Pekka Van Tent, F Vielva, P. Villa, F. Vittorio, N. Wandelt, B. D. Wehus, Ingunn Kathrine White, M. Zacchei, A Zonca, A. Planck intermediate results: XLVII. Planck constraints on reionization history |
author_facet |
Adam, R. Aghanim, N. Ashdown, M. Aumont, J. Baccigalupi, C. Ballardini, M. Banday, A. J. Barreiro, R. B. Bartolo, N. Basak, S. Battye, R. Benabed, K. Bernard, J.-P. Bersanelli, M. Bielewicz, P. Bock, J. J. Bonaldi, A. Bonavera, L. Bond, J. R. Borrill, J. Bouchet, F. R. Boulanger, F. Bucher, M. Burigana, C. Calabrese, E. Cardoso, J.-F. Carron, J. Chiang, H. C. Colombo, L. P. L. Combet, C. Comis, B. Couchot, F. Coulais, A. Crill, B. P. Curto, A. Cuttaia, F. Davis, R. J. de Bernardis, P. de Rosa, A. de Zotti, G. Delabrouille, J. Di Valentino, E. Dickinson, C. Diego, J. M. Doré, O. Douspis, M. Ducout, A. Dupac, X. Elsner, F. Enßlin, T. A. Eriksen, Hans Kristian Kamfjord Falgarone, E. Fantaye, Yabebal Tadesse Finelli, F. Forastieri, F. Frailis, M. Fraisse, A. A. Franceschi, E. Frolov, A Galeotta, S. Galli, S. Ganga, K. Génova-Santos, R. T. Gerbino, M Ghosh, T. González-Nuevo, J. Górski, Krzysztof M. Gruppuso, A. Gudmundsson, J. E. Hansen, Frode Kristian Helou, G. Henrot-Versillé, S. Herranz, D. Hivon, E. Huang, Z. Ilic, S. Jaffe, A. H. Jones, W. C. Keihänen, Elina Keskitalo, R. Kisner, T. S. Knox, L. Krachmalnicoff, N. Kunz, M. Kurki-Suonio, Hannu Lagache, G Lähteenmäki, A. Lamarre, J.-M. Langer, M Lasenby, A Lattanzi, M Lawrence, C. R. Le Jeune, M Levrier, F. Lewis, A Liguori, M. Lilje, Per Barth López-Caniego, M. Ma, Y.-Z. Macías-Pérez, J. F. Maggio, G. Mangilli, A Maris, M. Martin, P. G. Martínez-González, E. Matarrese, S. Mauri, N. McEwen, J. D. Meinhold, P. R. Melchiorri, A Mennella, A Migliaccio, M. Miville-Deschênes, M.-A. Molinari, D Moneti, A Montier, L Morgante, G Moss, A. Naselsky, P. Natoli, P Oxborrow, C. A. Pagano, L. Paoletti, D. Partridge, B Patanchon, G. Patrizii, L Perdereau, O Perotto, L Pettorino, V. Piacentini, F Plaszczynski, S Polastri, L Polenta, G Puget, J.-L. Rachen, J. P. Racine, Benjamin Reinecke, M. Remazeilles, M. Renzi, A Rocha, G. Rossetti, M. Roudier, G. Rubiño-Martín, J. A. Ruiz-Granados, B. Salvati, L Sandri, M Savelainen, M. Scott, D Sirri, G. Sunyaev, R Suur-Uski, A.-S. Tauber, J. A. Tenti, M. Toffolatti, L. Tomasi, M. Tristram, M. Trombetti, T Väliviita, Jussi-Pekka Van Tent, F Vielva, P. Villa, F. Vittorio, N. Wandelt, B. D. Wehus, Ingunn Kathrine White, M. Zacchei, A Zonca, A. |
author_sort |
Adam, R. |
title |
Planck intermediate results: XLVII. Planck constraints on reionization history |
title_short |
Planck intermediate results: XLVII. Planck constraints on reionization history |
title_full |
Planck intermediate results: XLVII. Planck constraints on reionization history |
title_fullStr |
Planck intermediate results: XLVII. Planck constraints on reionization history |
title_full_unstemmed |
Planck intermediate results: XLVII. Planck constraints on reionization history |
title_sort |
planck intermediate results: xlvii. planck constraints on reionization history |
publisher |
EDP Sciences |
publishDate |
2017 |
url |
http://hdl.handle.net/10852/55320 http://urn.nb.no/URN:NBN:no-58114 https://doi.org/10.1051/0004-6361/201628897 |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_source |
0004-6361 |
op_relation |
http://urn.nb.no/URN:NBN:no-58114 Adam, R. Aghanim, N. Ashdown, M. Aumont, J. Baccigalupi, C. Ballardini, M. Banday, A. J. Barreiro, R. B. Bartolo, N. Basak, S. Battye, R. Benabed, K. Bernard, J.-P. Bersanelli, M. Bielewicz, P. Bock, J. J. Bonaldi, A. Bonavera, L. Bond, J. R. Borrill, J. Bouchet, F. R. Boulanger, F. Bucher, M. Burigana, C. Calabrese, E. Cardoso, J.-F. Carron, J. Chiang, H. C. Colombo, L. P. L. Combet, C. Comis, B. Couchot, F. Coulais, A. Crill, B. P. Curto, A. Cuttaia, F. Davis, R. J. de Bernardis, P. de Rosa, A. de Zotti, G. Delabrouille, J. Di Valentino, E. Dickinson, C. Diego, J. M. Doré, O. Douspis, M. Ducout, A. Dupac, X. Elsner, F. Enßlin, T. A. Eriksen, Hans Kristian Kamfjord Falgarone, E. Fantaye, Yabebal Tadesse Finelli, F. Forastieri, F. Frailis, M. Fraisse, A. A. Franceschi, E. Frolov, A Galeotta, S. Galli, S. Ganga, K. Génova-Santos, R. T. Gerbino, M Ghosh, T. González-Nuevo, J. Górski, Krzysztof M. Gruppuso, A. Gudmundsson, J. E. Hansen, Frode Kristian Helou, G. Henrot-Versillé, S. Herranz, D. Hivon, E. Huang, Z. Ilic, S. Jaffe, A. H. Jones, W. C. Keihänen, Elina Keskitalo, R. Kisner, T. S. Knox, L. Krachmalnicoff, N. Kunz, M. Kurki-Suonio, Hannu Lagache, G Lähteenmäki, A. Lamarre, J.-M. Langer, M Lasenby, A Lattanzi, M Lawrence, C. R. Le Jeune, M Levrier, F. Lewis, A Liguori, M. Lilje, Per Barth López-Caniego, M. Ma, Y.-Z. Macías-Pérez, J. F. Maggio, G. Mangilli, A Maris, M. Martin, P. G. Martínez-González, E. Matarrese, S. Mauri, N. McEwen, J. D. Meinhold, P. R. Melchiorri, A Mennella, A Migliaccio, M. Miville-Deschênes, M.-A. Molinari, D Moneti, A Montier, L Morgante, G Moss, A. Naselsky, P. Natoli, P Oxborrow, C. A. Pagano, L. Paoletti, D. Partridge, B Patanchon, G. Patrizii, L Perdereau, O Perotto, L Pettorino, V. Piacentini, F Plaszczynski, S Polastri, L Polenta, G Puget, J.-L. Rachen, J. P. Racine, Benjamin Reinecke, M. Remazeilles, M. Renzi, A Rocha, G. Rossetti, M. Roudier, G. Rubiño-Martín, J. A. Ruiz-Granados, B. Salvati, L Sandri, M Savelainen, M. Scott, D Sirri, G. Sunyaev, R Suur-Uski, A.-S. Tauber, J. A. Tenti, M. Toffolatti, L. Tomasi, M. Tristram, M. Trombetti, T Väliviita, Jussi-Pekka Van Tent, F Vielva, P. Villa, F. Vittorio, N. Wandelt, B. D. Wehus, Ingunn Kathrine White, M. Zacchei, A Zonca, A. . Planck intermediate results: XLVII. Planck constraints on reionization history. Astronomy and Astrophysics. 2016, 596 http://hdl.handle.net/10852/55320 1453269 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Astronomy and Astrophysics&rft.volume=596&rft.spage=&rft.date=2016 Astronomy and Astrophysics 596 19 http://dx.doi.org/10.1051/0004-6361/201628897 URN:NBN:no-58114 Fulltext https://www.duo.uio.no/bitstream/handle/10852/55320/1/Intermediate_XLVII.pdf |
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https://doi.org/10.1051/0004-6361/201628897 |
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Astronomy & Astrophysics |
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ftoslouniv:oai:www.duo.uio.no:10852/55320 2023-05-15T18:22:53+02:00 Planck intermediate results: XLVII. Planck constraints on reionization history Adam, R. Aghanim, N. Ashdown, M. Aumont, J. Baccigalupi, C. Ballardini, M. Banday, A. J. Barreiro, R. B. Bartolo, N. Basak, S. Battye, R. Benabed, K. Bernard, J.-P. Bersanelli, M. Bielewicz, P. Bock, J. J. Bonaldi, A. Bonavera, L. Bond, J. R. Borrill, J. Bouchet, F. R. Boulanger, F. Bucher, M. Burigana, C. Calabrese, E. Cardoso, J.-F. Carron, J. Chiang, H. C. Colombo, L. P. L. Combet, C. Comis, B. Couchot, F. Coulais, A. Crill, B. P. Curto, A. Cuttaia, F. Davis, R. J. de Bernardis, P. de Rosa, A. de Zotti, G. Delabrouille, J. Di Valentino, E. Dickinson, C. Diego, J. M. Doré, O. Douspis, M. Ducout, A. Dupac, X. Elsner, F. Enßlin, T. A. Eriksen, Hans Kristian Kamfjord Falgarone, E. Fantaye, Yabebal Tadesse Finelli, F. Forastieri, F. Frailis, M. Fraisse, A. A. Franceschi, E. Frolov, A Galeotta, S. Galli, S. Ganga, K. Génova-Santos, R. T. Gerbino, M Ghosh, T. González-Nuevo, J. Górski, Krzysztof M. Gruppuso, A. Gudmundsson, J. E. Hansen, Frode Kristian Helou, G. Henrot-Versillé, S. Herranz, D. Hivon, E. Huang, Z. Ilic, S. Jaffe, A. H. Jones, W. C. Keihänen, Elina Keskitalo, R. Kisner, T. S. Knox, L. Krachmalnicoff, N. Kunz, M. Kurki-Suonio, Hannu Lagache, G Lähteenmäki, A. Lamarre, J.-M. Langer, M Lasenby, A Lattanzi, M Lawrence, C. R. Le Jeune, M Levrier, F. Lewis, A Liguori, M. Lilje, Per Barth López-Caniego, M. Ma, Y.-Z. Macías-Pérez, J. F. Maggio, G. Mangilli, A Maris, M. Martin, P. G. Martínez-González, E. Matarrese, S. Mauri, N. McEwen, J. D. Meinhold, P. R. Melchiorri, A Mennella, A Migliaccio, M. Miville-Deschênes, M.-A. Molinari, D Moneti, A Montier, L Morgante, G Moss, A. Naselsky, P. Natoli, P Oxborrow, C. A. Pagano, L. Paoletti, D. Partridge, B Patanchon, G. Patrizii, L Perdereau, O Perotto, L Pettorino, V. Piacentini, F Plaszczynski, S Polastri, L Polenta, G Puget, J.-L. Rachen, J. P. Racine, Benjamin Reinecke, M. Remazeilles, M. Renzi, A Rocha, G. Rossetti, M. Roudier, G. Rubiño-Martín, J. A. Ruiz-Granados, B. Salvati, L Sandri, M Savelainen, M. Scott, D Sirri, G. Sunyaev, R Suur-Uski, A.-S. Tauber, J. A. Tenti, M. Toffolatti, L. Tomasi, M. Tristram, M. Trombetti, T Väliviita, Jussi-Pekka Van Tent, F Vielva, P. Villa, F. Vittorio, N. Wandelt, B. D. Wehus, Ingunn Kathrine White, M. Zacchei, A Zonca, A. 2017-02-22T20:09:40Z http://hdl.handle.net/10852/55320 http://urn.nb.no/URN:NBN:no-58114 https://doi.org/10.1051/0004-6361/201628897 EN eng EDP Sciences http://urn.nb.no/URN:NBN:no-58114 Adam, R. Aghanim, N. Ashdown, M. Aumont, J. Baccigalupi, C. Ballardini, M. Banday, A. J. Barreiro, R. B. Bartolo, N. Basak, S. Battye, R. Benabed, K. Bernard, J.-P. Bersanelli, M. Bielewicz, P. Bock, J. J. Bonaldi, A. Bonavera, L. Bond, J. R. Borrill, J. Bouchet, F. R. Boulanger, F. Bucher, M. Burigana, C. Calabrese, E. Cardoso, J.-F. Carron, J. Chiang, H. C. Colombo, L. P. L. Combet, C. Comis, B. Couchot, F. Coulais, A. Crill, B. P. Curto, A. Cuttaia, F. Davis, R. J. de Bernardis, P. de Rosa, A. de Zotti, G. Delabrouille, J. Di Valentino, E. Dickinson, C. Diego, J. M. Doré, O. Douspis, M. Ducout, A. Dupac, X. Elsner, F. Enßlin, T. A. Eriksen, Hans Kristian Kamfjord Falgarone, E. Fantaye, Yabebal Tadesse Finelli, F. Forastieri, F. Frailis, M. Fraisse, A. A. Franceschi, E. Frolov, A Galeotta, S. Galli, S. Ganga, K. Génova-Santos, R. T. Gerbino, M Ghosh, T. González-Nuevo, J. Górski, Krzysztof M. Gruppuso, A. Gudmundsson, J. E. Hansen, Frode Kristian Helou, G. Henrot-Versillé, S. Herranz, D. Hivon, E. Huang, Z. Ilic, S. Jaffe, A. H. Jones, W. C. Keihänen, Elina Keskitalo, R. Kisner, T. S. Knox, L. Krachmalnicoff, N. Kunz, M. Kurki-Suonio, Hannu Lagache, G Lähteenmäki, A. Lamarre, J.-M. Langer, M Lasenby, A Lattanzi, M Lawrence, C. R. Le Jeune, M Levrier, F. Lewis, A Liguori, M. Lilje, Per Barth López-Caniego, M. Ma, Y.-Z. Macías-Pérez, J. F. Maggio, G. Mangilli, A Maris, M. Martin, P. G. Martínez-González, E. Matarrese, S. Mauri, N. McEwen, J. D. Meinhold, P. R. Melchiorri, A Mennella, A Migliaccio, M. Miville-Deschênes, M.-A. Molinari, D Moneti, A Montier, L Morgante, G Moss, A. Naselsky, P. Natoli, P Oxborrow, C. A. Pagano, L. Paoletti, D. Partridge, B Patanchon, G. Patrizii, L Perdereau, O Perotto, L Pettorino, V. Piacentini, F Plaszczynski, S Polastri, L Polenta, G Puget, J.-L. Rachen, J. P. Racine, Benjamin Reinecke, M. Remazeilles, M. Renzi, A Rocha, G. Rossetti, M. Roudier, G. Rubiño-Martín, J. A. Ruiz-Granados, B. Salvati, L Sandri, M Savelainen, M. Scott, D Sirri, G. Sunyaev, R Suur-Uski, A.-S. Tauber, J. A. Tenti, M. Toffolatti, L. Tomasi, M. Tristram, M. Trombetti, T Väliviita, Jussi-Pekka Van Tent, F Vielva, P. Villa, F. Vittorio, N. Wandelt, B. D. Wehus, Ingunn Kathrine White, M. Zacchei, A Zonca, A. . Planck intermediate results: XLVII. Planck constraints on reionization history. Astronomy and Astrophysics. 2016, 596 http://hdl.handle.net/10852/55320 1453269 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Astronomy and Astrophysics&rft.volume=596&rft.spage=&rft.date=2016 Astronomy and Astrophysics 596 19 http://dx.doi.org/10.1051/0004-6361/201628897 URN:NBN:no-58114 Fulltext https://www.duo.uio.no/bitstream/handle/10852/55320/1/Intermediate_XLVII.pdf 0004-6361 Journal article Tidsskriftartikkel Peer reviewed PublishedVersion 2017 ftoslouniv https://doi.org/10.1051/0004-6361/201628897 2020-06-21T08:50:29Z 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 additional information from the high-resolution Atacama Cosmology Telescope and South Pole Telescope experiments. The average redshift at which reionization occurs is found to lie between z = 7.8 and 8.8, depending on the model of reionization adopted. Using kSZ constraints and a redshift-symmetric reionization model, we find an upper limit to the width of the reionization period of Δz < 2.8. In all cases, we find that the Universe is ionized at less than the 10% level at redshifts above z ≃ 10. This suggests that an early onset of reionization is strongly disfavoured by the Planck data. We show that this result also reduces the tension between CMB-based analyses and constraints from other astrophysical sources. Article in Journal/Newspaper South pole Universitet i Oslo: Digitale utgivelser ved UiO (DUO) South Pole Astronomy & Astrophysics 596 A108 |