Cosmological Parameter Determination from Counts of Galaxies

Details Cosmological Parameter Determination from Counts of Galaxies Cosmological Parameter Determination from Counts of Galaxies

2001-06-29

arxiv.org/abs/astro-ph/0106549v1

Astrophys.J.563:28-33,2001

Astronomy and Astrophysics

Astrophysics

15 pages, 6 figures

Scientific paper

10.1086/323698

We study constraints that anticipated DEEP survey galaxy counts versus redshift data will place on cosmological model parameters in models with and without a constant or time-variable cosmological constant $\Lambda$. This data will result in fairly tight constraints on these parameters. For example, if all other parameters of a spatially-flat model with a constant $\Lambda$ are known, the galaxy counts data should constrain the nonrelativistic matter density parameter $\Omega_0$ to about 5% (10%, 1.5%) at 1 $\sigma$ with neutral (worst case, best case) assumptions about data quality.

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