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  Planck 2018 results - X. Constraints on inflation

Akrami, Y., Arroja, F., Ashdown, M., Aumont, J., Baccigalupi, C., Ballardini, M., et al. (2020). Planck 2018 results - X. Constraints on inflation. Astronomy and Astrophysics, 641: A10. doi:10.1051/0004-6361/201833887.

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Akrami, Y., Author
Arroja, F., Author
Ashdown, M., Author
Aumont, J., Author
Baccigalupi, C., Author
Ballardini, M., Author
Banday, A. J., Author
Barreiro, R. B., Author
Bartolo, N., Author
Basak, S., Author
Benabed, K., Author
Bernard, J.-P., Author
Bersanelli, M., Author
Bielewicz, P., Author
Bock, J. J., Author
Bond, J. R., Author
Borrill, J., Author
Bouchet, F. R., Author
Boulanger, F., Author
Bucher, M., Author
Burigana, C., AuthorButler, R. C., AuthorCalabrese, E., AuthorCardoso, J.-F., AuthorCarron, J., AuthorChallinor, A., AuthorChiang, H. C., AuthorColombo, L. P. L., AuthorCombet, C., AuthorContreras, D., AuthorCrill, B. P., AuthorCuttaia, F., Authorde Bernardis, P., Authorde Zotti, G., AuthorDelabrouille, J., AuthorDelouis, J.-M., AuthorValentino, E. Di, AuthorDiego, J. M., AuthorDonzelli, S., AuthorDoré, O., AuthorDouspis, M., AuthorDucout, A., AuthorDupac, X., AuthorDusini, S., AuthorEfstathiou, G., AuthorElsner, F.1, Author              Enßlin, T. A.2, Author              Eriksen, H. K., AuthorFantaye, Y., AuthorFergusson, J., AuthorFernandez-Cobos, R., AuthorFinelli, F., AuthorForastieri, F., AuthorFrailis, M., AuthorFranceschi, E., AuthorFrolov, A., AuthorGaleotta, S., AuthorGalli, S., AuthorGanga, K., AuthorGauthier, C., AuthorGénova-Santos, R. T., AuthorGerbino, M., AuthorGhosh, T., AuthorGonzález-Nuevo, J., AuthorGórski, K. M., AuthorGratton, S., AuthorGruppuso, A., AuthorGudmundsson, J. E., AuthorHamann, J., AuthorHandley, W., AuthorHansen, F. K., AuthorHerranz, D., AuthorHivon, E., AuthorHooper, D. C., AuthorHuang, Z., AuthorJaffe, A. H. , AuthorJones, W. C., AuthorKeihänen, E., AuthorKeskitalo, R., AuthorKiiveri, K., AuthorKim, J.3, Author              Kisner, T. S., AuthorKrachmalnico, N., AuthorKunz, M., AuthorKurki-Suonio, H., AuthorLagache, G., AuthorLamarre, J.-M., AuthorLasenby, A., AuthorLattanzi, M., AuthorLawrence, C. R., AuthorLe Jeune, M., AuthorLesgourgues, J., AuthorLevrier, F., AuthorLewis, A., AuthorLiguori, M., AuthorLilje, P. B., AuthorLindholm, V., AuthorLópez-Caniego, M., AuthorLubin, P. M., AuthorMa, Y.-Z., AuthorMacías-Pérez, J. F., AuthorMaggio, G., AuthorMaino, D., AuthorMandolesi, N., AuthorMangilli, A., AuthorMarcos-Caballero, A., AuthorMaris, M., AuthorMartin, P. G., AuthorMartínez-González, E., AuthorMatarrese, S., AuthorMauri, N., AuthorMcEwen, J. D., AuthorMeerburg, P. D., AuthorMeinhold, P. R., AuthorMelchiorri, A., AuthorMennella, A., AuthorMigliaccio, M., AuthorMitra, S., AuthorMiville-Deschênes, M.-A., AuthorMolinari, D., AuthorMoneti, A., AuthorMontier, L., AuthorMorgante, G., AuthorMoss, A., AuthorMünchmeyer, M., AuthorNatoli, P., AuthorNørgaard-Nielsen, H. U., AuthorPagano, L., AuthorPaoletti, D., AuthorPartridge, B., AuthorPatanchon, G., AuthorPeiris, H. V., AuthorPerrotta, F., AuthorPettorino, V., AuthorPiacentini, F., AuthorPolastri, L., AuthorPolenta, G., AuthorPuget, J.-L., AuthorRachen, J. P., AuthorReinecke, M.2, Author              Remazeilles, M., AuthorRenzi, A., AuthorRocha, G., AuthorRosset, C., AuthorRoudier, G., AuthorRubiño-Martín, J. A., AuthorRuiz-Granados, B., AuthorSalvati, L., AuthorSandri, M., AuthorSavelainen, M., AuthorScott, D., AuthorShellard, E. P. S., AuthorShiraishi, M., AuthorSirignano, C., AuthorSirri, G., AuthorSpencer, L. D., AuthorSunyaev, R.3, Author              Suur-Uski, A.-S., AuthorTauber, J. A., AuthorTavagnacco, D., AuthorTenti, M., AuthorToffolatti, L. , AuthorTomasi, M., AuthorTrombetti, T., AuthorValiviita, J., AuthorTent, B. Van, AuthorVielva, P., AuthorVilla, F., AuthorVittorio, N., AuthorWandelt, B. D., AuthorWehus, I. K., AuthorWhite, S. D. M.2, Author              Zacchei, A., AuthorZibin, J. P., AuthorZonca, A., Author more..
1Cosmology, MPI for Astrophysics, Max Planck Society, ou_159876              
2Computational Structure Formation, MPI for Astrophysics, Max Planck Society, ou_2205642              
3High Energy Astrophysics, MPI for Astrophysics, Max Planck Society, ou_159881              


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 Abstract: We report on the implications for cosmic inflation of the 2018 release of the Planck cosmic microwave background (CMB) anisotropy measurements. The results are fully consistent with those reported using the data from the two previous Planck cosmological releases, but have smaller uncertainties thanks to improvements in the characterization of polarization at low and high multipoles. Planck temperature, polarization, and lensing data determine the spectral index of scalar perturbations to be ns = 0.9649 ± 0.0042 at 68% CL. We find no evidence for a scale dependence of ns, either as a running or as a running of the running. The Universe is found to be consistent with spatial flatness with a precision of 0.4% at 95% CL by combining Planck with a compilation of baryon acoustic oscillation data. The Planck 95% CL upper limit on the tensor-to-scalar ratio, r0.002 <  0.10, is further tightened by combining with the BICEP2/Keck Array BK15 data to obtain r0.002 <  0.056. In the framework of standard single-field inflationary models with Einstein gravity, these results imply that: (a) the predictions of slow-roll models with a concave potential, V″(ϕ) < 0, are increasingly favoured by the data; and (b) based on two different methods for reconstructing the inflaton potential, we find no evidence for dynamics beyond slow roll. Three different methods for the non-parametric reconstruction of the primordial power spectrum consistently confirm a pure power law in the range of comoving scales 0.005 Mpc−1 ≲ k ≲ 0.2 Mpc−1. A complementary analysis also finds no evidence for theoretically motivated parameterized features in the Planck power spectra. For the case of oscillatory features that are logarithmic or linear in k, this result is further strengthened by a new combined analysis including the Planck bispectrum data. The new Planck polarization data provide a stringent test of the adiabaticity of the initial conditions for the cosmological fluctuations. In correlated, mixed adiabatic and isocurvature models, the non-adiabatic contribution to the observed CMB temperature variance is constrained to 1.3%, 1.7%, and 1.7% at 95% CL for cold dark matter, neutrino density, and neutrino velocity, respectively. Planck power spectra plus lensing set constraints on the amplitude of compensated cold dark matter-baryon isocurvature perturbations that are consistent with current complementary measurements. The polarization data also provide improved constraints on inflationary models that predict a small statistically anisotropic quadupolar modulation of the primordial fluctuations. However, the polarization data do not support physical models for a scale-dependent dipolar modulation. All these findings support the key predictions of the standard single-field inflationary models, which will be further tested by future cosmological observations.


Language(s): eng - English
 Dates: 2020-09-11
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1051/0004-6361/201833887
Other: LOCALID: 3276731
 Degree: -



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Title: Astronomy and Astrophysics
  Other : Astron. Astrophys.
Source Genre: Journal
Publ. Info: France : EDP Sciences S A
Pages: - Volume / Issue: 641 Sequence Number: A10 Start / End Page: - Identifier: ISSN: 1432-0746
CoNE: https://pure.mpg.de/cone/journals/resource/954922828219_1