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    Exploring cosmic origins with CORE: Cosmological parameters


    Di Valentino, E. and Brinckmann, T. and Gerbino, M. and Poulin, V. and Bouchet, F.R. and Lesgourgues, J. and Melchiorri, A. and Chluba, J. and Clesse, S. and Delabrouille, J. and Dvorkin, Cora and Forastieri, F. and Galli, S. and Hooper, Deanna C. and Lattanzi, M. and Martins, C.J.A.P. and Salvati, L. and Cabass, Giovanni and Caputo, Andrea and Giusarma, Elena and Hivon, E. and Natoli, P. and Pagano, L. and Paradiso, Simone and Rubino-Martin, J.A. and Achúcarro, A. and Ade, P.A.R. and Allison, R. and Arroja, Frederico and Ashdown, M. and Ballardini, M. and Banday, A.J. and Banerji, R. and Bartolo, N. and Bartlett, J.G. and Basak, S. and Baselmans, J. and Baumann, D. and De Bernardis, P. and Bersanelli, M. and Bonaldi, A. and Bonato, M. and Borrill, J. and Boulanger, F. and Bucher, M. and Burigana, C. and Buzzelli, A. and Cai, Z.Y. and Calvo, M. and Carvalho, C.S. and Castellano, Gabriella and Challinor, A. and Charles, I. and Colantoni, I. and Coppolecchia, A. and Crook, M. and D’Alessandro, Giuseppe and De Petris, M. and de Zotti, G. and Diego, J.M. and Errard, J. and Feeney, S. and Fernandez-Cobos, R. and Ferraro, S. and Finelli, F. and de Gasperis, G. and Genova-Santos, R.T. and Gonzalez-Nuevo, J. and Grandis, S. and Greenslade, J. and Hagstotz, S. and Hanany, S. and Handley, W. and Hazra, Dhiraj K. and Hernandez-Monteagudo, C. and Hervias-Caimapo, C. and Hills, M. and Kiiveri, K. and Kisner, T.S. and Kitching, T. and Kunz, M. and Kurki-Suonio, H. and Lamagna, L. and Lasenby, A. and Lewis, A. and Liguori, M. and Lindholm, V. and Lopez-Caniego, M. and Luzzi, G. and Maffei, B. and Martin, S. and Martinez-Gonzalez, E. and Masi, S. and McCarthy, Darragh and Melin, J.-B. and Mohr, J.J. and Molinari, D. and Monfardini, A. and Negrello, M. and Notari, A. and Paiella, A. and Paoletti, D. and Patanchon, G. and Piacentini, F. and Piat, M. and Pisano, G. and Polastri, L. and Polenta, G. and Pollo, A. and Quartin, M. and Remazeilles, M. and Roman, M. and Ringeval, Christophe and Tartari, A. and Tomasi, M. and Tramonte, D. and Trappe, Neil and Trombetti, T. and Tucker, C. and Valiviita, J. and van de Weygaert, R. and Van Tent, B. and Vennin, V. and Vermeulen, G. and Vielva, P. and Vittorio, N. and Young, K. and Zannoni, M. (2017) Exploring cosmic origins with CORE: Cosmological parameters. Journal of Cosmology and Astroparticle Physics, 4 (017). ISSN 1475-7516

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    Abstract

    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 mediumsized 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.

    Item Type: Article
    Additional Information: This is the preprint version of the published article, which is available at: E. Di Valentino et al JCAP04(2018)017
    Keywords: Exploring cosmic origins; CORE; Cosmological parameters;
    Academic Unit: Faculty of Science and Engineering > Experimental Physics
    Item ID: 13311
    Identification Number: https://doi.org/10.1088/1475-7516/2018/04/017
    Depositing User: Dr. Neil Trappe
    Date Deposited: 29 Sep 2020 14:13
    Journal or Publication Title: Journal of Cosmology and Astroparticle Physics
    Publisher: IOP Publishing
    Refereed: Yes
    URI:

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