NARROW QUASAR ABSORPTION-LINES AND THE HISTORY OF THE UNIVERSE

In order to get an estimation of the parameters of the cosmological mo del the statistics of narrow absorption lines in quasar spectra is eva luated. To this end a phenomenological model of the evolution of the c orresponding absorbers in density, size, number and dimension is prese nted and compared with the observed evolution in the spectral density of the lines and their column density seen in the equivalent width. In spite of the wide range of possible models, the Einstein-deSitter mod el is shown to be unlikely because of the implied fast evolution in ma ss.