Cosmic microwave background anisotropy constraints on open and flat-A cold dark matter cosmogonies from UCSB South Pole, ARGO, MAX, White Dish, and SuZIE data

We use combinations of 10 small-scale cosmic microwave background anisotropy data sets from the UCSB South Pole 1994, ARGO, MAX 4 and 5, White Dish, and SuZIE experiments to constrain cosmogonies. We consider open and spatially flat-A cold dark matter cosmogonies with nonrelativistic mass density parameter Omega(0) in the range 0.1-1, baryonic mass density parameter Omega(B) in the range 0.005-0.029 h(-2), and age of the universe t(0) in the range 10-20 Gyr. Marginalizing over all parameters but Omega(0) the combined data favor a Omega(0) similar or equal to 1 (1) open (flat-Lambda) model. Excluding the smallest angular scale SuZIE data, an Omega(0) similar or equal to 0.3 (1) open (flat-Lambda) model is favored. Considering only multifrequency data with error bars consistent with sample variance and noise considerations, i.e., the South Pole 1994 Ka band, the MAX 4 iota Draconis, and the MAX 5 HR5127 data, an Omega(0) similar or equal to 0.1 (1) open (flat-Lambda) model is favored. For both open and flat-Lambda models and for all three combinations of data sets, after marginalizing over all other parameters, a lower Omega(B)h(2) (similar to 0.005) or younger (t(0) similar to 10 Gyr) universe is favored. However, the data do not rule out other values of Omega(0) in the flat-Lambda model and other values of Omega(B)h(2) in both models. At 2 sigma confidence, model normalizations deduced from the small-scale data are consistent with those derived from the Differential Microwave Radiometer data. We emphasize that since we consider only a small number of data sets, these results are tentative.