Abstract

We present a model for the H II emission line spectrum in galaxies, where the initial stellar mass distribution is calculated as a function of the cluster size, allowing a stochastic dispersion around a preselected initial mass function. This translates in an upper mass limit cutoff in the resulting initial mass distribution that depends on the size of cluster. We obtain the H alpha, H beta, [O II]lambda 3727 and [O III]lambda 5007 luminosities and we compare them with the results of previous models.