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The CMB temperature power spectrum from an improved analysis of the Archeops data

Tristram, M., Patanchon, G., Macías-Pérez, J. F., Ade, Peter A. R., Amblard, A., Ansari, R., Aubourg, É., Benoît, A., Bernard, J.-Ph., Blanchard, A., Bock, J. J., Bouchet, F. R., Bourrachot, A., Camus, P., Cardoso, J.-F., Couchot, F., de Bernardis, P., Delabrouille, J., Désert, F. -X., Douspis, M., Dumoulin, L., Filliatre, Ph., Fosalba, P., Giard, M., Giraud-Héraud, Y., Gispert, R., Guglielmi, L., Hamilton, J. -Ch., Hanany, S., Henrot-Versillé, S., Kaplan, J., Lagache, G., Lamarre, J. -M., Lange, A. E., Madet, K., Maffei, Bruno, Magneville, Ch., Masi, S., Mayet, F., Nati, F., Perdereau, O., Plaszczynski, S., Piat, M., Ponthieu, N., Prunet, S., Renault, C., Rosset, C., Santos, D., Vibert, D. and Yvon, D. 2005. The CMB temperature power spectrum from an improved analysis of the Archeops data. Astronomy and Astrophysics 436 (3) , pp. 785-797. 10.1051/0004-6361:20042416

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We present improved results on the measurement of the angular power spectrum of the Cosmic Microwave Background (CMB) temperature anisotropies using the data from the last ARCHEOPS flight. This refined analysis is obtained by using the 6 most sensitive photometric pixels in the CMB bands centered at 143 and 217 GHz and 20% of the sky, mostly clear of foregrounds. Using two different cross-correlation methods, we obtain very similar results for the angular power spectrum. Consistency checks are performed to test the robustness of these results paying particular attention to the foreground contamination level which remains well below the statistical uncertainties. The multipole range from (l) =10 to (l) =700 is covered with 25 bins, confirming strong evidence for a plateau at large angular scales (the Sachs-Wolfe plateau) followed by two acoustic peaks centered around (l)=220 and (l)=550 respectively. These data provide an independent confirmation, obtained at different frequencies, of the WMAP first year results.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Uncontrolled Keywords: cosmology: cosmic microwave background -- cosmology: observations -- methodes: data analysis
Additional Information: Pdf uploaded in accordance with publisher's policy at (accessed 17/04/2014)
Publisher: EDP Sciences
ISSN: 0004-6361
Date of First Compliant Deposit: 30 March 2016
Last Modified: 04 Jun 2017 04:37

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