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Cosmological constraints from Archeops

Benoît, A. and Bhatia, R. S. and Bock, J. J. and Lange, A. E. and Ganga, K. (2003) Cosmological constraints from Archeops. Astronomy & Astrophysics, 399 . L25-L30. ISSN 0004-6361. doi:10.1051/0004-6361:20021722.

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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 ℓ and large ℓ coverage down to COBE scales, Archeops provides a precise determination of the first acoustic peak in terms of position at multipole l_(peak) = 220 ± 6, height and width. An analysis of Archeops data in combination with other CMB datasets constrains the baryon content of the Universe, Ω_bh^2 = 0.022^(+0.003)_(-0.004), 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. Ω_(tot) = 1.00^(+0.03)_(-0.02) 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 1.04^(+0.10)_(-0.12) when the optical depth to reionization, τ, is allowed to vary as a free parameter, and 0.96^(+0.03)_(-0.04) when τ is fixed to zero, both in good agreement with inflation.

Item Type:Article
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URLURL TypeDescription Paper
Bock, J. J.0000-0002-5710-5212
Additional Information:© 2003 ESO. Received: 16 October 2002. Accepted: 22 November 2002. 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.
Funding AgencyGrant Number
Centre National d'Études Spatiales (CNES)UNSPECIFIED
Programme National de Cosmologie (PNC)UNSPECIFIED
Agenzia Spaziale Italiana (ASI)UNSPECIFIED
Particle Physics and Astronomy Research Council (PPARC)UNSPECIFIED
University of MinnesotaUNSPECIFIED
American Astronomical SocietyUNSPECIFIED
European CommissionUNSPECIFIED
Subject Keywords:cosmic microwave background - cosmological parameters - early Universe - large-scale structure of the Universe
Record Number:CaltechAUTHORS:20180207-112040907
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Official Citation:A. Benoît, P. Ade, A. Amblard, R. Ansari, É. Aubourg, S. Bargot, J. G. Bartlett, J.–Ph. Bernard, R. S. Bhatia, A. Blanchard, J. J. Bock, A. Boscaleri, F. R. Bouchet, A. Bourrachot, P. Camus, F. Couchot, P. de Bernardis, J. Delabrouille, F.–X. Désert, O. Doré, M. Douspis, L. Dumoulin, X. Dupac, P. Filliatre, P. Fosalba, K. Ganga, F. Gannaway, B. Gautier, M. Giard, Y. Giraud–Héraud, R. Gispert, L. Guglielmi, J.–Ch. Hamilton, S. Hanany, S. Henrot–Versillé, J. Kaplan, G. Lagache, J.–M. Lamarre, A. E. Lange, J. F. Macías–Pérez, K. Madet, B. Maffei, Ch. Magneville, D. P. Marrone, S. Masi, F. Mayet, A. Murphy, F. Naraghi, F. Nati, G. Patanchon, G. Perrin, M. Piat, N. Ponthieu, S. Prunet, J.–L. Puget, C. Renault, C. Rosset, D. Santos, A. Starobinsky, I. Strukov, R. V. Sudiwala, R. Teyssier, M. Tristram, C. Tucker, J.–C. Vanel, D. Vibert, E. Wakui and D. Yvon A&A, 399 3 (2003) L25-L30 DOI:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:84717
Deposited By: Ruth Sustaita
Deposited On:08 Feb 2018 16:15
Last Modified:15 Nov 2021 20:22

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