Constraints on Cosmological Parameters from MAXIMA-1

Дата и время публикации : 2000-05-08T22:25:27Z

Авторы публикации и институты :
A. Balbi
P. Ade
J. Bock
J. Borrill
A. Boscaleri
P. de Bernardis
P. G. Ferreira
S. Hanany
V. V. Hristov
A. H. Jaffe
A. T. Lee
S. Oh
E. Pascale
B. Rabii
P. L. Richards
G. F. Smoot
R. Stompor
C. D. Winant
J. H. P. Wu

Оригинал статьи :

Скачать pdf :

Ссылка на журнал-издание: Astrophys.J. 545 (2000) L1-L4; Erratum-ibid. 558 (2001) L145-L146
Коментарии к статье: 4 pages, 4 figures. Reflects version published on ApJ Letters. Includes erratum (1 page, 2 figures) as published on ApJ Letters
Первичная категория: astro-ph

Все категории : astro-ph

Краткий обзор статьи: 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.

Category: Physics