Constraints on cosmological parameters from MAXIMA-1

Journal Article · Mon May 08 00:00:00 EDT 2006 · Astrophysical Journal

OSTI ID:893619

Balbi, A; Ade, P; Bock, J; Borrill, J; Boscaleri, A; DeBernardis, P; Ferreira, P G; Hanany, S; Hristov, V; Jaffe, A H; Lee, A T; Oh, S; Pascale,; E,; Rabii, B; Richards, R L; Smoot, G F; Stompor, R; Winant, C D; Wu, J H.P.

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 l in the first flight of the MAXIMA balloon-borne experiment (MAXIMA-1) and the low-l results from the COBE Differential Microwave Radiometer experiment. We find constraints on the total energy density of the universe, Omega = 1.0(-0.30)(+0.15), 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(-0.1)(+0.2), and the spectral index of primordial scalar fluctuations, n(s) = 1.08 +/- 0.1,all at the 95 percent 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 percent confidence level. Our results are consistent with a hat universe and the shape parameter deduced from large-scale structure, and in marginal agreement with the baryon density from big bang nucleosynthesis.

• Research Organization: COLLABORATION - U. Ropma TorVegata/Italy
• DOE Contract Number: AC02-05CH11231
• OSTI ID: 893619
• Report Number(s): LBNL--61803
• Journal Information: Astrophysical Journal, Journal Name: Astrophysical Journal Journal Issue: 1pt2 Vol. 545; ISSN ASJOAB; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
COSMOLOGICAL CONSTANT
ENERGY DENSITY
FLUCTUATIONS
NONLUMINOUS MATTER
NUCLEOSYNTHESIS
RADIOMETERS
RELICT RADIATION
SCALARS
SHAPE
SUPERNOVAE
UNIVERSE