OVRO CMB Anisotropy Measurement Constraints on Flat-Lambda and Open CDM Cosmogonies
Abstract
We use Owens Valley Radio Observatory (OVRO) cosmic microwave background (CMB) anisotropy data to constrain cosmological parameters. We account for the OVRO beamwidth and calibration uncertainties, as well as the uncertainty induced by the removal of non-CMB foreground contamination. We consider open and spatially-flat-Lambda cold dark matter cosmogonies, with nonrelativistic-mass density parameter Omega0 in the range 0.1--1, baryonic-mass density parameter OmegaB in the range (0.005--0.029)h-2, and age of the universe t0 in the range (10--20) Gyr. Marginalizing over all parameters but Omega0, the OVRO data favors an open (spatially-flat-Lambda) model with Omega0 ~= 0.33 (0.1). At the 2 sigma confidence level model normalizations deduced from the OVRO data are mostly consistent with those deduced from the DMR, UCSB South Pole 1994, Python I-III, ARGO, MAX 4 and 5, White Dish, and SuZIE data sets.
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