Understanding higher-order nonlocal halo bias at large scales by combining the power spectrum with the bispectrum

The authors study the relation between underlying matter distribution and galaxies (the galaxy bias problem), and present a vast and compelling study of nonlocal and higher order contributions to dark matter halo bias. They investigate how well different bias models fit simulated dark matter halos, and demonstrate the need to include nonlocal terms in order to accurately model the statistics of halos.