| HAL: hal-00009173, version 1 |
| arXiv: astro-ph/0210306 |
| ADS Bibliographic id: 2003A&A...399L..25B |
| DOI: 10.1051/0004-6361:20021722 |
| Detailed view | Export this paper |
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| Astronomy and Astrophysics 399 (2003) L25-L30 |
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| Cosmological constraints from Archeops |
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| A. Benoit 1P. Ade |
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| For the ARCHEOPS collaboration(s) |
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| (2003) |
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| We analyze the cosmological constraints that Archeops 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 (+0.003,-0.004), compatible with Big-Bang nucleosynthesis and with a similar accuracy. Using cosmological priors obtainedfrom recent non-CMB data leads to yet tighter constraints on the total density, e.g. Omega(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, tau, is allowed to vary as a free parameter, and 0.96 (+0.03,-0.04) when tau is fixed to zero, both in good agreement with inflation. |
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| 1: | Centre de Recherches sur les Très Basses Températures (CRTBT) |
| CNRS : UPR5001 – Université Joseph Fourier - Grenoble I – Institut National Polytechnique de Grenoble (INPG) | |
| 2: | Physique Corpusculaire et Cosmologie - Collège de France (PCC) |
| CNRS : UMR7553 – IN2P3 – Université Paris VII - Paris Diderot | |
| 3: | Laboratoire de l'Accélérateur Linéaire (LAL) |
| CNRS : UMR8607 – IN2P3 – Université Paris XI - Paris Sud | |
| 4: | Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA) |
| CEA : DSM/DAPNIA | |
| 5: | Institut d'astrophysique spatiale (IAS) |
| CNRS : UMR8617 – INSU – Université Paris XI - Paris Sud | |
| 6: | Laboratoire d'Astrophysique de l'Observatoire Midi-Pyrénées (LATT) |
| CNRS : UMR5572 – INSU – Observatoire Midi-Pyrénées – Université Paul Sabatier [UPS] - Toulouse III | |
| 7: | Institut d'Astrophysique de Paris (IAP) |
| CNRS : UMR7095 – INSU – Université Pierre et Marie Curie [UPMC] - Paris VI | |
| 8: | Laboratoire d'Astrophysique de Grenoble (LAOG) |
| CNRS : UMR5571 – OSUG – INSU – Université Joseph Fourier - Grenoble I | |
| 9: | Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM) |
| CNRS : UMR8609 – IN2P3 – Université Paris XI - Paris Sud | |
| 10: | Centre d'étude spatiale des rayonnements (CESR) |
| CNRS : UMR5187 – Observatoire Midi-Pyrénées – INSU – Université Paul Sabatier [UPS] - Toulouse III | |
| 11: | Laboratoire de Physique Subatomique et de Cosmologie (LPSC) |
| CNRS : UMR5821 – IN2P3 – Université Joseph Fourier - Grenoble I – Institut Polytechnique de Grenoble - Grenoble Institute of Technology | |
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| Subject | : | Physics/Astrophysics/Cosmology and Extra-Galactic Astrophysics Sciences of the Universe/Astrophysics |
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| Fulltext link: |
| hal-00009173, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00009173 | |
| oai:hal.archives-ouvertes.fr:hal-00009173 | |
| From: Import arXiv | |
| Submitted on: Wednesday, 30 May 2007 21:46:26 | |
| Updated on: Thursday, 31 May 2007 09:05:10 | |