Large-scale clustering of galaxies in the CfA Redshift Survey

We use the Center for Astrophysics Redshift Survey, now complete to m_B_ < 15.5 over eleven 6^deg^ slices, to measure the power spectrum of the galaxy distribution up to wavelengths ~200 h^-1^ Mpc. The combination of large spatial and angular extent with high sampling density allows simultaneous measurement of the power spectrum on both large and small scales. Comparison with large (L ~> 400 h^-1^ Mpc) N-body simulations of cosmological models shows that the power spectrum of the standard CDM model ({OMEGA}h = 0.5 and σ_8_ = 1; see below for definitions) is inconsistent with the observed power spectrum at the 99% confidence level. The power spectrum of an open CDM model ({OMEGA}h = 0.2 and σ_8_ = 1) best approximates the observed power spectrum for wavelengths < 125 h^-1^ Mpc.