Determine the galaxy bias factors on large scales using bispectrum method

Understand

We study whether the bias factors of galaxies can be unbiasedly recovered from their power spectra and bispectra.

• We use a set of numerical N-body simulations and construct large mock galaxy catalogs based upon the semi-analytical model of Croton et al.
• (2006).
• We measure the reduced bispectra for galaxies of different luminosity, and determine the linear and first nonlinear bias factors from their bispectra.