Cosmological constraints from archeops

By A. Benoit, P. Ade, A. Amblard, R. Ansari, E. Aubourg, S. Bargot, J. Bartlett, J. Bernard, R. Bhatia, A. Blanchard and 81 more. 2002

185 citations recorded by the source corpus.

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.

Subfields: Artificial Intelligence, Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/667a6e3a6321e761e36b5b48852b141e46b9b404

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Citations in the corpus

Constraints on the Equation of State of Dark Energy and the Hubble Constant from Stellar Ages and the Cosmic Microwave Background (2003, background): “…diagram of Type Ia supernovae (Riess et al. 1998; Perlmutter et al. 1999), the angular power spectrum of the cosmic microwave background (CMB; Benoit et al. 2003; Ruhl et al. 2002; Goldstein et al. 2003) in combination with galaxy surveys (Efstathiou et al. 2002; Verde et al. 2002) and…”
Exploring the expanding Universe and dark energy using the statefinder diagnostic (2003, background): “Supernova observations (Riess et al. 1998; Perlmutter et al. 1999), when combined with those of the cosmic microwave background (Benoit et al. 2003) and gravitational clustering (Percival 2002), suggest that our Universe is (approximately) spatially flat and that an exotic form of negativepressure…”
Generalized Chaplygin gas as a unified scenario of dark matter/energy: Observational constraints (2004, result): “Using the CMBR power spectrum measurements from BOOMERANG (de Bernardis et al. 2002) and Archeops (Benoit et al. 2003), together with the SNeIa constraints, Bento et al. (2003a) obtained, 0.74 ∼ < As ∼< 0.85, andα ∼< 0.6, which is comparable with our results.”
HEALPix: A Framework for High-Resolution Discretization and Fast Analysis of Data Distributed on the Sphere (2004, methodology): “This is manifested by applications of HEALPix by the following projects: CMB experiments Boomerang (deBernardis et al, 2000, Ruhl et al 2003), Archeops (Benoit et al, 2003ab), and TopHat, satellite mission WMAP (WMAP2003), the forthcoming satellite mission Planck, the Sloan Digital Sky Survey, and o”