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We have computed a series of realistic and self-consistent models that havebeen shown to be able to reproduce the emitted spectra of HII galaxies in astar bursting scenario (Martin-Majon et al. 2008). Our models combine differentcodes of chemical evolution, evolutionary population synthesis andphotoionization. The emitted spectrum of HII galaxies is reproduced by means ofthe photoionization code CLOUDY (Ferland, 1998), using as ionizing spectrum thespectral energy distribution (SED) of the modelled HII galaxy, calculated usingthe new and updated stellar population models PopStar (Molla & Garcia-Vargas2009, in prep.).This, in turn, is calculated according to a star formationhistory and a metallicity evolution given by a chemical evolution model. Eachmodel is characterized by three parameters which are going to determine theevolution of the modeled galaxy: an initial efficiency of star formation, theway in which burst take place, and the time of separation between these bursts.Some model results emerging from the combination of different values for thesethree parameters are shown here. Our technique reproduces observed abundances,diagnostic diagrams and equivalent width-colour relations for local HIIgalaxies.

Modelling Starbursts in HII Galaxies: What do we need to fit the observations?