Evolution of colour-dependence of galaxy clustering up to z $\sim$ 1.2 based on the data from the VVDS-Wide survey

Abstract

We discuss the dependence of galaxy clustering according to their colours up to z $\sim$ 1.2. For that purpose we used one of the wide fields (F22) from the VIMOS-VLT Deep Survey (VVDS). For galaxies with absolute luminosities close to the characteristic Schechter luminosities M* at a given redshift, we measured the projected two-point correlation function $w_{p}(r_{p})$ and we estimated the best-fit parameters for a single power-law model: $\xi (r) = (r/r_{0})^{-\gamma }$, where $r_{0}$ is the correlation length and \gamma is the slope of correlation function. Our results show that red galaxies exhibit the strongest clustering in all epochs up to z $\sim$ 1.2. Green valley represents the "intermediate" population and blue cloud shows the weakest clustering strength. We also compared the shape of $w_{p}(r_{p})$ for different galaxy populations. All three populations have different clustering properties on the small scales, similarly to the behaviour observed in the local catalogues