Can stellar winds account for temperature fluctuations in HII regions? Thecase of NGC 2363

We compare the rate of kinetic energy injected by stellar winds into the ex tragalactic H II region NGC 2363 to the luminosity needed to feed the obser ved temperature fluctuations. The kinetic luminosity associated to the wind s is estimated by means of two different evolutionary synthesis codes, one of which takes into account the statistical fluctuations expected in the In itial Mass Function. We find that, even in the most favorable conditions co nsidered by our model, such luminosity is much smaller than the luminosity needed to account for the observed temperature fluctuations. The assumption s underlying our study are emphasized as possible sources of uncertainty af fecting our results.