Cosmological constraints from Archeops

被引:196
作者
Benoît, A
Ade, P
Amblard, A
Ansari, R
Aubourg, É
Bargot, S
Bartlett, JG
Bernard, JP
Bhatia, RS
Blanchard, A
Bock, JJ
Boscalerilo, A
Bouchet, FR
Bourrachot, A
Camus, P
Couchot, E
de Bernardis, P
Delabrouille, J
Désert, EX
Doré, O
Douspis, M
Dumoulin, L
Dupac, X
Filliatre, P
Fosalba, P
Ganga, K
Gannaway, E
Gautier, B
Giard, A
Giraud-Héraud, Y
Gispert, R
Guglielmi, L
Hamilton, JC
Hanany, S
Henrot-Versillé, S
Kaplan, J
Lagache, G
Lamarre, JM
Lange, AE
Macías-Pérez, JE
Madet, K
Maffei, B
Magneville, C
Marrone, DP
Masi, S
Mayet, F
Murphy, A
Naraghi, E
Nati, F
Patanchon, G
机构
[1] CNRS, Ctr Rech Tres Basses Temp, F-38042 Grenoble 9, France
[2] Cardiff Univ, Dept Phys, Cardiff CF24 3YB, S Glam, Wales
[3] Coll France, F-75231 Paris 5, France
[4] Lab Accelerateur Lineaire, F-91898 Orsay, France
[5] Ctr Etud Saclay, CEA, DAPNIA, Serv Phys Particules, F-91191 Gif Sur Yvette, France
[6] Observ Midi Pyrenees, Astrophys Lab, F-31400 Toulouse, France
[7] Univ Paris 11, Inst Astrophys Spatiale, F-91405 Orsay, France
[8] CALTECH, Ctr Infrared Proc & Anal, Pasadena, CA 91125 USA
[9] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA
[10] CNR, IROE, I-50127 Florence, Italy
[11] Inst Astrophys, F-75014 Paris, France
[12] Univ Roma La Sapienza, Dipartimento Fis, Grp Cosmol Sperimentale, I-00185 Rome, Italy
[13] Observ Grenoble, Astrophys Lab, F-38041 Grenoble 9, France
[14] Nucl & Astrophys Lab, Oxford OX1 3RH, England
[15] Ctr Spectrometrie Nucl & Spectrometrie Masse, IN2P3, F-91405 Orsay, France
[16] Ctr Etud Spatiale Rayonnements, F-31028 Toulouse 4, France
[17] Inst Sci Nucl Grenoble, F-38026 Grenoble, France
[18] Univ Minnesota, Sch Phys & Astron, Minneapolis, MN 55455 USA
[19] Natl Univ Ireland, Maynooth, Kildare, Ireland
[20] LD Landau Theoret Phys Inst, Moscow 119334, Russia
[21] Moscow Space Res Inst, Moscow 117810, Russia
[22] Ctr Etud Saclay, CEA, DAPNIA, Serv Astrophys, F-91191 Gif Sur Yvette, France
[23] Univ Paris 07, Federat Rech APC, Paris, France
[24] Observ Paris, LERMA, F-75014 Paris, France
关键词
cosmic microwave background; cosmological parameters; early Universe; large-scale structure of the Universe;
D O I
10.1051/0004-6361:20021722
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We analyze the cosmological constraints that Archeops (Benoit 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, Omega(b)h(2) = 0.022(-0.004)(+0.003), 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. Q(tot) = 1.00(-0.02)(+0.03) 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(-0.12)(+0.10) when the optical depth to reionization, tau, is allowed to vary as a free parameter, and 0.96(-0.04)(+0.03) when tau is fixed to zero, both in good agreement with inflation.
引用
收藏
页码:L25 / L30
页数:6
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