  Baryonic acoustic oscillations imprinted in the galaxy power spectrum provide
a promising tool for probing the cosmological distance scale and dark energy.
We present results from a suite of cosmological N-body simulations aimed at
investigating possible systematic errors in the recovery of cosmological
distances. We show the robustness of baryonic peaks against nonlinearity,
redshift distortions, and mild biases within the linear and quasilinear region
at various redshifts. While mildly biased tracers follow the matter power
spectrum well, redshift distortions do partially obscure baryonic features in
redshift space compared to real space. We calculate the statistical constraints
on cosmological distortions from N-body results and compare these to the
analytic results from a Fisher matrix formalism. We conclude that the angular
diameter distance will be constrained as well as our previous Fisher matrix
calculations while the Hubble parameter will be less constrained because of
nonlinear redshift distortions.
