Alex KROLEWSKI
(UC Berkeley)
Moderate-resolution optical spectra of closely-spaced background quasars and Lyman-break galaxies can be used to reconstructed the 3D structure of the universe at z ~ 2 with comoving resolution ~2.5 h^-1 Mpc. We present the CLAMATO survey, which aims to map a volume of 10^6 h^-1 Mpc^3 at z~2, identifying voids, protoclusters, and other large-scale structures, and placing galaxies in their cosmic environment at the epoch of peak star formation. We characterize the properties and evolution of three protoclusters discovered within our field, present the first detection of voids at z~2, and measure the bias and redshift-space distortions of galaxy samples at z~2 using cross-correlations with the Lyman-alpha forest.