Cosmic microwave background anisotropy in COBE DMR-normalized open and flat-Lambda cold dark matter cosmogonies

We compute the cosmic microwave background (CMB) anisotropy in open and flat-Lambda cold dark matter (CDM) cosmogonies which are normalized to the two-year DMR sky maps. Presently available CMB data are consistent with Omega(0) similar to 0.3-0.4 open models but do not strongly disfavor open models with either Omega(0) similar to 0.1 or Omega(0) similar to 1. There are indications that old (t(0) greater than or similar to 15-16 Gyr), high baryon density (Omega(B) greater than or similar to 0.0175 h(-2)), low-density (Omega(0) similar to 0.2-0.4), spatially flat Lambda models have more intermediate-scale power than is suggested by presently available CMB anisotropy observations. Accumulating CMB data should strengthen the observational discriminative power; however, a better understanding of systematic effects will be needed before it will be possible to draw robust conclusions about model viability.