The redshift distribution of quasar absorption lines and its origin

We have made statistical analyses of current data on the absorption line redshifts of quasars. All our results, including the distribution of relative velocities and the power-spectrum of the redshift distribution of absorption systems, are in favour of the cosmological hypothesis of the origin of the quasar absorption lines. We point out that the peaks in the relative velocity distribution are no compelling evidence for the rival, intrinsic hypothesis because they can be well explained by the model of density perturbation in the early universe [10].