Testing Low-Redshift Cosmic Acceleration with Large-Scale Structure

We examine the cosmological implications of measurements of the void-galaxy cross-correlation at redshift z=0. 57 combined with baryon acoustic oscillation (BAO) data at 0. 110σ significance from these data alone, independent of the cosmic microwave background (CMB) and supernovae. Using a nucleosynthesis prior on Ω₁h^2, we measure the Hubble constant to be H₀=72. 3±1. 9 km s^-1 Mpc^-1 from BAO+voids at z40%, but remaining consistent with flat Λ cold dark matter.