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    Cosmological constraints from Archeops

    Benoit, A. and Ade, P.A.R. and Amblard, A. and Ansari, R. and Aubourg, É. and Bargot, S. and Bartlett, J.G. and Bernard, J.-P. and Bhatia, R. and Blanchard, A. and Bock, J.J. and Boscaleri, A. and Bouchet, F.R. and Bourrachot, A. and Camus, P. and Couchot, F. and De Bernardis, P. and Delabrouille, J. and Desert, F.-X. and Dore, O. and Douspis, M. and Dumoulin, L. and Dupac, X. and Filliatre, P. and Fosalba, P. and Ganga, K. and Gannaway, F. and Gautier, B. and Giard, M. and Giraud-Héraud, Y. and Gispert, R. and Guglielmi, L. and Hamilton, J.-Ch. and Hanany, S. and Henrot-Versille, S. and Kaplan, J. and Lagache, G. and Lamarre, J.-M. and Lange, A.E. and Macias-Perez, J.F. and Madet, K. and Maffei, B. and Magneville, Ch. and Marrone, D.P. and Masi, S. and Mayet, F. and Murphy, J.Anthony and Naraghi, F. and Nati, F. and Patanchon, G. and Perrin, G. and Piat, M. and Ponthieu, N. and Prunet, S. and Puget, J.-L. and Renault, C. and Rosset, C. and Santos, D. and Starobinsky, Alexei A. and Strukov, I. and Sudiwala, R. and Teyssier, R. and Tristram, M. and Tucker, C. and Vanel, J.-C. and Vibert, D. and Wakui, E. and Yvon, D. (2003) Cosmological constraints from Archeops. Astronomy & Astrophysics, 399 (3). L25-L30. ISSN 0004-6361

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    We analyze the cosmological constraints that Archeops (Benoît et al. 2003) places on adiabatic cold dark matter models with passive power-law initial fluctuations. Because its angular power spectrum has small bins in and large coverage down to COBE scales, Archeops provides a precise determination of the first acoustic peak in terms of position at multipole , height and width. An analysis of Archeops data in combination with other CMB datasets constrains the baryon content of the Universe, , compatible with Big-Bang nucleosynthesis and with a similar accuracy. Using cosmological priors obtained from recent non–CMB data leads to yet tighter constraints on the total density, e.g. using the HST determination of the Hubble constant. An excellent absolute calibration consistency is found between Archeops and other CMB experiments, as well as with the previously quoted best fit model. The spectral index n is measured to be when the optical depth to reionization, τ, is allowed to vary as a free parameter, and when τ is fixed to zero, both in good agreement with inflation.

    Item Type: Article
    Additional Information: The authors would like to thank the following institutes for funding and balloon launching capabilities: CNES (French space agency), PNC (French Cosmology Program), ASI (Italian Space Agency), PPARC, NASA, the University of Minnesota, the American Astronomical Society and a CMBNet Research Fellowship from the European Commission.
    Keywords: cosmic microwave background; cosmological parameters; early Universe; large–scale structure of the Universe;
    Academic Unit: Faculty of Science and Engineering > Experimental Physics
    Item ID: 14010
    Identification Number:
    Depositing User: Dr. Anthony Murphy
    Date Deposited: 15 Feb 2021 15:36
    Journal or Publication Title: Astronomy & Astrophysics
    Publisher: EDP Sciences
    Refereed: Yes
    Use Licence: This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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