Cosmological-Model-Parameter Determination from Satellite-Acquired Type Ia and IIP Supernova Data

Abstract

We examine the constraints that satellite-acquired Type Ia and IIP supernova apparent magnitude versus redshift data will place on cosmological model parameters in models with and without a constant or time-variable cosmological constant $Λ$. High-quality data which could be acquired in the near future will result in tight constraints on these parameters. For example, if all other parameters of a spatially-flat model with a constant $Λ$ are known, the supernova data should constrain the non-relativistic matter density parameter $Ω_0$ to better than 1% (2%, 0.5%) at 1$σ$ with neutral (worst case, best case) assumptions about data quality.

16 pages, 6 figures