Cosmic complementarity: Joint parameter estimation from cosmic microwave background experiments and redshift surveys

We study the ability of future cosmic microwave background anisotropy exper iments and redshift surveys to constrain a 13-dimensional parameterization of the adiabatic cold dark matter model. Each alone is unable to determine all parameters to high accuracy. However, considered together, one data set resolves the difficulties of the other, allowing certain degenerate parame ters to be determined with far greater precision. We treat in detail the de generacies involving the classical cosmological parameters, massive neutrin os, tensor-scalar ratio, bias, and reionization optical depth as well as ho w redshift surveys can resolve them. We discuss the opportunities for inter nal and external consistency checks on these measurements. Previous papers on parameter estimation have generally treated smaller parameter spaces; in direct comparisons to these works, we tend to find weaker constraints and suggest numerical explanations for the discrepancies.