Planck 2015 results : XX Constraints on inflation

Articolo

Data di Pubblicazione:

2016

Citazione:

Planck 2015 results : XX Constraints on inflation / P.A.R. Ade, N. Aghanim, C. Armitage Caplan, M. Arnaud, M. Ashdown, F. Atrio Barandela, J. Aumont, H. Aussel, C. Baccigalupi, A.J. Banday, R.B. Barreiro, R. Barrena, M. Bartelmann, J.G. Bartlett, E. Battaner, K. Benabed, A. Benoît, A. Benoit Lévy, J.P. Bernard, M. Bersanelli, P. Bielewicz, I. Bikmaev, J. Bobin, J.J. Bock, H. Böhringer, A. Bonaldi, J.R. Bond, J. Borrill, F.R. Bouchet, M. Bridges, M. Bucher, R. Burenin, C. Burigana, R.C. Butler, J.F. Cardoso, P. Carvalho, A. Catalano, A. Challinor, A. Chamballu, R.R. Chary, X. Chen, H.C. Chiang, L.Y. Chiang, G. Chon, P.R. Christensen, E. Churazov, S. Church, D.L. Clements, S. Colombi, L.P.L. Colombo, B. Comis, F. Couchot, A. Coulais, B.P. Crill, A. Curto, F. Cuttaia, A. Da Silva, H. Dahle, L. Danese, R.D. Davies, R.J. Davis, P. de Bernardis, A. de Rosa, G. de Zotti, J. Delabrouille, J.M. Delouis, J. Démoclès, F.X. Désert, C. Dickinson, J.M. Diego, K. Dolag, H. Dole, S. Donzelli, O. Doré, M. Douspis, X. Dupac, G. Efstathiou, T.A. Enßlin, H.K. Eriksen, F. Feroz, A. Ferragamo, F. Finelli, I. Flores Cacho, O. Forni, M. Frailis, E. Franceschi, S. Fromenteau, S. Galeotta, K. Ganga, R.T. Génova Santos, M. Giard, G. Giardino, M. Gilfanov, Y. Giraud Héraud, J. González Nuevo, K.M. Górski, K.J.B. Grainge, S. Gratton, A. Gregorio, N.E. Groeneboom, A. Gruppuso, F.K. Hansen, D. Hanson, D. Harrison, A. Hempel, S. Henrot Versillé, C. Hernández Monteagudo, D. Herranz, S.R. Hildebrandt, E. Hivon, M. Hobson, W.A. Holmes, A. Hornstrup, W. Hovest, K.M. Huffenberger, G. Hurier, N. Hurley Walker, A.H. Jaffe, T.R. Jaffe, W.C. Jones, M. Juvela, E. Keihänen, R. Keskitalo, I. Khamitov, T.S. Kisner, R. Kneissl, J. Knoche, L. Knox, M. Kunz, H. Kurki Suonio, G. Lagache, A. Lähteenmäki, J.M. Lamarre, A. Lasenby, R.J. Laureijs, C.R. Lawrence, J.P. Leahy, R. Leonardi, J. León Tavares, J. Lesgourgues, C. Li, A. Liddle, M. Liguori, P.B. Lilje, M. Linden Vørnle, M. López Caniego, P.M. Lubin, J.F. Macías Pérez, C.J. MacTavish, B. Maffei, D. Maino, N. Mandolesi, M. Maris, D.J. Marshall, P.G. Martin, E. Martínez González, S. Masi, M. Massardi, S. Matarrese, F. Matthai, P. Mazzotta, S. Mei, P.R. Meinhold, A. Melchiorri, J.B. Melin, L. Mendes, A. Mennella, M. Migliaccio, K. Mikkelsen, S. Mitra, M.A. Miville Deschênes, A. Moneti, L. Montier, G. Morgante, D. Mortlock, D. Munshi, J.A. Murphy, P. Naselsky, A. Nastasi, F. Nati, P. Natoli, N.P.H. Nesvadba, C.B. Netterfield, H.U. Nørgaard Nielsen, F. Noviello, D. Novikov, I. Novikov, I.J. O’Dwyer, M. Olamaie, S. Osborne, C.A. Oxborrow, F. Paci, L. Pagano, F. Pajot, D. Paoletti, F. Pasian, G. Patanchon, T.J. Pearson, O. Perdereau, L. Perotto, Y.C. Perrott, F. Perrotta, F. Piacentini, M. Piat, E. Pierpaoli, D. Pietrobon, S. Plaszczynski, E. Pointecouteau, G. Polenta, N. Ponthieu, L. Popa, T. Poutanen, G.W. Pratt, G. Prézeau, S. Prunet, J.L. Puget, J.P. Rachen, W.T. Reach, R. Rebolo, M. Reinecke, M. Remazeilles, C. Renault, S. Ricciardi, T. Riller, I. Ristorcelli, G. Rocha, C. Rosset, G. Roudier, M. Rowan Robinson, J.A. Rubiño Martín, C. Rumsey, B. Rusholme, M. Sandri, D. Santos, R.D.E. Saunders, G. Savini, M.P. Schammel, D. Scott, M.D. Seiffert, E.P.S. Shellard, T.W. Shimwell, L.D. Spencer, J.L. Starck, V. Stolyarov, R. Stompor, A. Streblyanska, R. Sudiwala, R. Sunyaev, F. Sureau, D. Sutton, A.S. Suur Uski, J.F. Sygnet, J.A. Tauber, D. Tavagnacco, L. Terenzi, L. Toffolatti, M. Tomasi, D. Tramonte, M. Tristram, M. Tucci, J. Tuovinen, M. Türler, G. Umana, L. Valenziano, J. Valiviita, B. Van Tent, L. Vibert, P. Vielva, F. Villa, N. Vittorio, L.A. Wade, B.D. Wandelt, M. White, S.D.M. White, D. Yvon, A. Zacchei, A. Zonca. - In: ASTRONOMY & ASTROPHYSICS. - ISSN 1432-0746. - 594(2016 Oct 03).

Abstract:

We present the implications for cosmic inflation of the Planck measurements of the cosmic microwave background (CMB) anisotropies in both temperature and polarization based on the full Planck survey. The Planck full mission temperature data and a first release of polarization data on large angular scales measure the spectral index of curvature perturbations to be $n_mathrms = 0.968 pm 0.006$ and tightly constrain its scale dependence to $d n_s/d ln k =-0.003 pm 0.007$ when combined with the Planck lensing likelihood. When the high-$ell$ polarization data is included, the results are consistent and uncertainties are reduced. The upper bound on the tensor-to-scalar ratio is $r_0.002 < 0.11$ (95% CL), consistent with the B-mode polarization constraint $r< 0.12$ (95% CL) obtained from a joint BICEP2/Keck Array and Planck analysis. These results imply that $V(phi) propto phi^2$ and natural inflation are now disfavoured compared to models predicting a smaller tensor-to-scalar ratio, such as $R^2$ inflation. Three independent methods reconstructing the primordial power spectrum are investigated. The Planck data are consistent with adiabatic primordial perturbations. We investigate inflationary models producing an anisotropic modulation of the primordial curvature power spectrum as well as generalized models of inflation not governed by a scalar field with a canonical kinetic term. The 2015 results are consistent with the 2013 analysis based on the nominal mission data.

Tipologia IRIS:

01 - Articolo su periodico

Keywords:

astro-ph.CO; astro-ph.CO; cosmic background radiation; cosmology: theory; early universe; inflation

Elenco autori: