Planck 2018 results. X. Constraints on inflation

  title={Planck 2018 results. X. Constraints on inflation},
  author={Planck Collaboration Y. Akrami and Frederico M. A. Arroja and Mark Ashdown and J. Aumont and Carlo Baccigalupi and Mario Ballardini and Anthony J. Banday and Rita Bel{\'e}n Barreiro and Nicola Bartolo and Soumen Basak and Karim Benabed and J-Ph. Bernard and M. Bersanelli and Pawel Bielewicz and James J. Bock and J. Richard Bond and Julian Borrill and Francois R. Bouchet and Francois Boulanger and Manfred Bucher and Carlo Burigana and R. C. Butler and Erminia Calabrese and J.-F. Cardoso and Julien Carron and Anthony Challinor and H. C. Chiang and Loris P. L. Colombo and C{\'e}line Combet and Dagoberto Contreras and Brendan P. Crill and F. Cuttaia and Paolo Bernardis and Gianfranco de Zotti and Jacques Delabrouille and J. M. Delouis and Eleonora Di Valentino and Jose M. Diego and Simona Donzelli and Olivier Dor'e and Marian Douspis and Anne Ducout and Xavier Dupac and Stefano Dusini and George P. Efstathiou and Franz Elsner and Torsten A. Ensslin and Hans Kristian Eriksen and Yabebal T. Fantaye and J. R. Fergusson and Ra{\'u}l Fern{\'a}ndez-Cobos and Fabio Finelli and Francesco Forastieri and Marco Frailis and Enrico Franceschi and Andrei V. Frolov and S. Galeotta and Silvia Galli and Ken Ganga and C. Gauthier and Ricardo T. G'enova-Santos and Martina Gerbino and Tuhin Ghosh and Joaquin Gonz'alez-Nuevo and Krzysztof M. G'orski and Steven Gratton and Alessandro Gruppuso and Jon E. Gudmundsson and Jan Hamann and W. J. Handley and Frode K. Hansen and Diego Herranz and Eric Hivon and Deanna C. Hooper and Z. Huang and Andrew H. Jaffe and William C Jones and Elina Keihanen and Reijo Keskitalo and Kimmo Kiiveri and J. Kim and Theodore Kisner and Nicoletta Krachmalnicoff and Martin Kunz and Hannu Kurki-Suonio and Guilaine Lagache and J-M. Lamarre and Anthony N. Lasenby and Massimiliano Lattanzi and Charles R. Lawrence and Maude Le Jeune and Julien Lesgourgues and F. Levrier and A. M. Lewis and Michele Liguori and Per B. Lilje and V. Lindholm and M. L'pez-Caniego and Philip Lubin and Y.-Z. Ma and Juan-Fancisco Mac'ias-P'erez and Gianmarco Maggio and Davide Maino and Nazzareno Mandolesi and Anna Mangilli and Airam Marcos-Caballero and Michele Maris and P. G. Martin and E. Mart'inez-Gonz'alez and S. Matarrese and Nicoletta Mauri and Jason D. McEwen and Pieter Daniel Meerburg and Peter Meinhold and Alessandro Melchiorri and Aniello Mennella and Marina Migliaccio and Subhasish Mitra and Marc-Antoine Miville-Desch{\^e}nes and Diego Molinari and Andrea Moneti and Ludovic Montier and G. Morgante and Adam Moss and Moritz Munchmeyer and Paolo Natoli and Hans Ulrik N{\o}rgaard-Nielsen and Luca Pagano and Daniela Paoletti and Bruce Partridge and Guillaume Patanchon and Hiranya V. Peiris and F. Perrotta and Valeria Pettorino and Francesco Piacentini and Linda Polastri and Gianluca Polenta and J-L. Puget and Jorg P. Rachen and Martin Reinecke and Mathieu Remazeilles and Alessandro Renzi and Graca M. Rocha and C. Dutruc Rosset and Gael M. Roudier and Jos'e Alberto Rubino-Mart'in and Beatriz Ruiz-Granados and Laura Salvati and M. Sandri and Matti Savelainen and Douglas Scott and E. P. S. Shellard and Maresuke Shiraishi and C. Sirignano and G. Sirri and Locke D Spencer and Rashid Sunyaev and A.-S. Suur-Uski and Jan Tauber and Daniele Tavagnacco and M. Tenti and Luigi Toffolatti and Maurizio Tomasi and Tiziana Trombetti and Jussi Valiviita and Bartjan van Tent and Patricio Vielva and Fabrizio Villa and Nicola Vittorio and Benjamin D. Wandelt and Ingunn Kathrine Wehus and Simon D. M. White and Andrea Zacchei and James P. Zibin and Andrea Zonca},
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… 
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