Astronomy and Astrophysics – Astrophysics
Scientific paper
2000-05-08
Astrophys.J. 545 (2000) L1-L4; Erratum-ibid. 558 (2001) L145-L146
Astronomy and Astrophysics
Astrophysics
4 pages, 4 figures. Reflects version published on ApJ Letters. Includes erratum (1 page, 2 figures) as published on ApJ Letter
Scientific paper
10.1086/323608
We set new constraints on a seven-dimensional space of cosmological parameters within the class of inflationary adiabatic models. We use the angular power spectrum of the cosmic microwave background measured over a wide range of \ell in the first flight of the MAXIMA balloon-borne experiment (MAXIMA-1) and the low \ell results from COBE/DMR. We find constraints on the total energy density of the universe, \Omega=1.0^{+0.15}_{-0.30}, the physical density of baryons, \Omega_{b}h^2=0.03 +/- 0.01, the physical density of cold dark matter, \Omega_{cdm}h^2=0.2^{+0.2}_{-0.1}$, and the spectral index of primordial scalar fluctuations, n_s=1.08+/-0.1, all at the 95% confidence level. By combining our results with measurements of high-redshift supernovae we constrain the value of the cosmological constant and the fractional amount of pressureless matter in the universe to 0.45<\Omega_\Lambda<0.75 and 0.25<\Omega_{m}<0.50, at the 95% confidence level. Our results are consistent with a flat universe and the shape parameter deduced from large scale structure, and in marginal agreement with the baryon density from big bang nucleosynthesis.
Ade Peter
Balbi Amedeo
Bock James Joseph
Borrill Julian
Boscaleri Andrea
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