Year: 2003
Type: article
Abstract: 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.
Source: Astronomy and Astrophysics
Authors: 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, D. Yvon
Institutions: Cardiff University, Collège de France, Laboratoire AstroParticule et Cosmologie, Laboratoire de l'Accélérateur Linéaire, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, CEA Paris-Saclay, Institut d'Astrophysique Spatiale, Université Paris-Sud, California Institute of Technology, Observatoire Midi-Pyrénées, Jet Propulsion Laboratory, National Research Council, Institut d'Astrophysique de Paris, Sapienza University of Rome, Observatoire de Paris, Laboratoire d’Etudes du Rayonnement et de la Matière en Astrophysique et Atmosphères
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W1980960646