Exploring cosmic origins with CORE: Cosmological parameters

E. Di Valentino, T. Brinckmann, M. Gerbino, V. Poulin, F. R. Bouchet, J. Lesgourgues, A. Melchiorri, J. Chluba, S. Clesse, J. Delabrouille, C. Dvorkin, F. Forastieri, S. Galli, D. C. Hooper, M. Lattanzi, C. J.A.P. Martins, L. Salvati, G. Cabass, A. Caputo, E. GiusarmaE. Hivon, P. Natoli, L. Pagano, S. Paradiso, J. A. Rubiño-Martin, A. Achúcarro, P. Ade, R. Allison, F. Arroja, M. Ashdown, M. Ballardini, A. J. Banday, R. Banerji, N. Bartolo, J. G. Bartlett, S. Basak, D. Baumann, P. De Bernardis, M. Bersanelli, A. Bonaldi, M. Bonato, J. Borrill, F. Boulanger, M. Bucher, C. Burigana, A. Buzzelli, Z. Y. Cai, M. Calvo, C. S. Carvalho, G. Castellano, A. Challinor, I. Charles, I. Colantoni, A. Coppolecchia, M. Crook, G. D'Alessandro, M. De Petris, G. De Zotti, J. M. Diego, J. Errard, S. Feeney, R. Fernandez-Cobos, S. Ferraro, F. Finelli, G. De Gasperis, R. T. Génova-Santos, J. González-Nuevo, S. Grandis, J. Greenslade, S. Hagstotz, S. Hanany, W. Handley, D. K. Hazra, C. Hernández-Monteagudo, C. Hervias-Caimapo, M. Hills, K. Kiiveri, T. Kisner, T. Kitching, M. Kunz, H. Kurki-Suonio, L. Lamagna, A. Lasenby, A. Lewis, M. Liguori, V. Lindholm, M. Lopez-Caniego, G. Luzzi, B. Maffei, S. Martin, E. Martinez-Gonzalez, S. Masi, S. Matarrese, D. McCarthy, J. B. Melin, J. J. Mohr, D. Molinari, A. Monfardini, M. Negrello, A. Notari, A. Paiella, D. Paoletti, G. Patanchon, F. Piacentini, M. Piat, G. Pisano, L. Polastri, G. Polenta, A. Pollo, M. Quartin, M. Remazeilles, M. Roman, C. Ringeval, A. Tartari, M. Tomasi, D. Tramonte, N. Trappe, T. Trombetti, C. Tucker, J. Väliviita, R. Van De Weygaert, B. Van Tent, V. Vennin, G. Vermeulen, P. Vielva, N. Vittorio, K. Young, M. Zannoni

Research output: Contribution to journalArticlepeer-review

120 Scopus citations


We forecast the main cosmological parameter constraints achievable with the CORE space mission which is dedicated to mapping the polarisation of the Cosmic Microwave Background (CMB). CORE was recently submitted in response to ESA's fifth call for medium-sized mission proposals (M5). Here we report the results from our pre-submission study of the impact of various instrumental options, in particular the telescope size and sensitivity level, and review the great, transformative potential of the mission as proposed. Specifically, we assess the impact on a broad range of fundamental parameters of our Universe as a function of the expected CMB characteristics, with other papers in the series focusing on controlling astrophysical and instrumental residual systematics. In this paper, we assume that only a few central CORE frequency channels are usable for our purpose, all others being devoted to the cleaning of astrophysical contaminants. On the theoretical side, we assume ΛCDM as our general framework and quantify the improvement provided by CORE over the current constraints from the Planck 2015 release. We also study the joint sensitivity of CORE and of future Baryon Acoustic Oscillation and Large Scale Structure experiments like DESI and Euclid. Specific constraints on the physics of inflation are presented in another paper of the series. In addition to the six parameters of the base ΛCDM, which describe the matter content of a spatially flat universe with adiabatic and scalar primordial fluctuations from inflation, we derive the precision achievable on parameters like those describing curvature, neutrino physics, extra light relics, primordial helium abundance, dark matter annihilation, recombination physics, variation of fundamental constants, dark energy, modified gravity, reionization and cosmic birefringence. In addition to assessing the improvement on the precision of individual parameters, we also forecast the post-CORE overall reduction of the allowed parameter space with figures of merit for various models increasing by as much as ∼ 107 as compared to Planck 2015, and 105 with respect to Planck 2015 + future BAO measurements.

Original languageEnglish (US)
Article number017
JournalJournal of Cosmology and Astroparticle Physics
Issue number4
StatePublished - Apr 5 2018

Bibliographical note

Funding Information:
49INFN Roma 2, via della Ricerca Scientifica 1, 00133, Roma, Italy 50Leung Center for Cosmology and Particle Astrophysics, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei, 10617 Taipei, Taiwan (R.O.C.) 51Universitéde Toulouse, UPS-OMP, IRAP, F-31028 Toulouse Cedex 4, France 52CNRS, IRAP, 9 Av. colonel Roche, BP 44346, F-31028 Toulouse Cedex 4, France 55Dipartimento di Fisica, Università degli Studi di Milano, Via Celoria 16, 20133 Milano, Italy 56Computational Cosmology Center, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, U.S.A. 57IAS (Institut d’Astrophysique Spatiale), UniversitéParis Sud, Bâtiment 121 91405 Orsay, France 58Univ. Grenoble Alpes, CEA INAC-SBT, 38000 Grenoble, France 59Institute of Astrophysics and Space Sciences, University of Lisbon, Tapada da Ajuda, 1349-018 Lisbon, Portugal 60Istituto di Fotonica e Nanotecnologie, CNR, Via Cineto Romano 42, 00156, Roma, Italy 61Institute of Astronomy, Madingley Road, Cambridge CB3 0HA, U.K. 62STFC Rutherford Appleton Laboratory, Harwell Campus, Didcot OX11 0QX, U.K. 63Mullard Space Science Laboratory, University College London, Holmbury St. Mary, Darking, Surrey, RH5 6NT, U.K. 64Department of Experimental Physics, Maynooth University, Maynooth, County Kildare, W23 F2H6, Ireland 65School of Physics and Astronomy, University of Minnesota, 116 Church Street SE, Minneapolis, Minnesota 55455, U.S.A. 66Institut Néel CNRS/UGA UPR2940, 25, rue des Martyrs BP 166, 38042 Grenoble Cedex 9, France 67Departament de Física Quàntica i Astrofísica i Institut de Ciències del Cosmos (ICCUB), Universitat de Barcelona, Martíi Franquès 1, E-08028 Barcelona, Spain 68Agenzia Spaziale Italiana Science Data Center, via del Politecnico, 00133 Roma, Italy 69Department of Physics & Astronomy, Tufts University, 574 Boston Avenue, Medford, MA, U.S.A. 70INAF, Osservatorio Astronomico di Roma, via di Frascati 33, Monte Porzio Catone, Italy 71National Centre for Nuclear Research, ul. Hoza 69, 00-681 Warszawa, Poland 72Astronomical Observatory of the Jagiellonian University, Orla 171, 30-001 Cracow, Poland 73Instituto de Fisica, Universidade Federal do Rio de Janeiro, 21941-972, Rio de Janeiro, RJ, Brazil 74Institut Lagrange, LPNHE, place Jussieu 4, 75005 Paris, France 75INAF, IASF Milano, Via E. Bassini 15, Milano, Italy 77Institute for Theoretical Physics and Center for Extreme Matter and Emergent Phenomena, Utrecht University, Princetonplein 5, 3584 CC Utrecht, The Netherlands 78Kapteyn Astronomical Institute, University of Groningen, P.O. Box 800, 9700AV Groningen, The Netherlands 79Dipartimento di Fisica, Università di Milano Bicocca, Milano, Italy 80INFN, sezione di Milano Bicocca, Milano, Italy

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  • CMBR experiments
  • cosmological parameters from CMBR
  • neutrino masses from cosmology


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