Non-local bias and the problem of large-scale power in the Standard Cold Dark Matter model

We study the effect of non-radial motions, originating from the gravitation al interaction of the quadrupole moment of a protogalaxy with the tidal fie ld of the matter of the neighboring protostructures, on the angular correla tion function of galaxies. We calculate the angular correlation function us ing a Standard Cold Dark Matter (hereafter SCDM) model (Omega = 1, h = 0.5, n = 1) and we compare it with the angular correlation function of the APM galaxy survey (Maddox et al. 1990; Maddox et al. 1996). We find that taking account of non-radial motions in the calculation of the angular correlatio n function gives a better agreement of the theoretical prediction of the SC DM model to the observed estimates of large-scale power in the galaxy distr ibution.