Cosmological Model Parameter Determination from Satellite‐acquired Supernova Apparent Magnitude versus Redshift Data

We examine the constraints that satellite-acquired 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. 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 Ω0 to better than 1 % (2%, 0.5%) at 1σ with neutral (worst case, best case) assumptions about data quality. Subject headings: cosmology: observation—large-scale structure of the universe—space vehicles—supernovae: general 1.