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Symposium 241

Abstract details

Sampling effects in the emission line spectra of HII regions
Marcos Villaverde, Valentina Luridiana, Miguel Cerviño

The combination of stellar population synthesis models and photoionization models allows a better understanding of the spectral features of HII regions and HII galaxies. In this poster we show that sampling effects in the initial mass function (IMF) are very important in the low cluster mass case. To this aim, we compare the SEDs of clusters made up of various combinations of individual stars and a fixed total mass to the average SED computed by standard synthesis models, i.e. one that assumes a completely sampled IMF. A photoionization model with fixed nebular parameters was computed with each of these SEDs. We discuss the differences in the predicted emission spectra in the light of the stellar mass of typical HII regions.

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