The environments of high redshift radio galaxies and quasars: probes of protoclusters

摘要: We use the GALFORM semi-analytical model to study high-density regions traced by radio galaxies and quasars at high redshifts. explore impact that baryonic physics has upon properties of in these environments. Star-forming emission-line (Ly α H α emitters) are used probe environments Radio predicted be hosted more massive haloes than quasars, this is imprinted on amplitude galaxy overdensities cross-correlation functions. find Ly α radiative transfer active galactic nucleus feedback indirectly affect clustering small scales also stellar masses, star formation rates gas metallicities dense investigate relation between protoclusters associated with their present-day cluster descendants. The progenitors clusters allow us determine an average protocluster size a simple way. Overdensities within found correlate halo descendant masses. present scaling relations can applied observational data. By computing projection effects due wavelength resolution modern spectrographs narrow-band filters, we show former have enough spectral map structure protoclusters, whereas latter measure around over larger mass dark matter hosting them