ARGO Cosmic Microwave Background Anisotropy Measurement Constraints on Open and Flat‐Λ Cold Dark Matter Cosmogonies

We use data from the ARGO cosmic microwave background (CMB) anisotropyexperiment to constrain cosmogonies. We account for the ARGO beamwidth andcalibration uncertainties, and marginalize over the offset removed from thedata. Our derived amplitudes of the CMB anisotropy detected by the ARGOexperiment are smaller than those derived previously. We consider open and spatially-flat-Lambda cold dark matter cosmogonies, withclustered-mass density parameter Omega_0 in the range 0.1-1, baryonic-massdensity parameter Omega_B in the range (0.005-0.029)h^{-2}, and age of theuniverse t_0 in the range (10--20) Gyr. Marginalizing over all parameters butOmega_0, the ARGO data favors an open (spatially-flat-Lambda) model withOmega_0= 0.23 (0.1). However, these numerical values are model dependent. At the 2 sigma confidence level model normalizations deduced from the ARGOdata are consistent with those drawn from the UCSB South Pole 1994, MAX 4+5,White Dish, and SuZIE data sets. The ARGO open model normalizations are alsoconsistent with those deduced from the DMR data. However, for mostspatially-flat-Lambda models the DMR normalizations are more than 2 sigma abovethe ARGO ones.Comment: 21 pages of latex. Uses aaspp4.sty. 8 figures included. ApJ in pres