We estimate the degree to which the baryon density, Ωb, can be determined from the galaxy power spectrum measured from large-scale galaxy redshift surveys, and in particular, the Sloan Digital Sky Survey. A high baryon density will cause wiggles to appear in the power spectrum, which should be observable at the current epoch. We assume linear theory on scales ≥20 h-1 Mpc and do not include the effects of redshift distortions, evolution, or biasing. With an optimum estimate of P(k) to k ∼ 2π/(20 h-1 Mpc), the 1 σ uncertainties in Ωb are roughly 0.07 and 0.016 in flat and open (Ω0 = 0.3) cosmological models, respectively. This result suggests that it should be possible to test for consistency with big bang nucleosynthesis estimates of Ωb if we live in an open universe.
All Science Journal Classification (ASJC) codes
- Astronomy and Astrophysics
- Space and Planetary Science
- Cosmology: Theory
- Large-scale structure of universe
- Methods: Data analysis
- Methods: Statistical