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SPECTROSCOPY OF H II DWARF GALAXIES IN THE VIRGO CLUSTER

A spectrophotometric study of a sample of dwarf H II galaxies located in the Virgo Cluster has been performed. Long-slit optical spectroscopy has been obtained for 25 blue dwarf galaxies selected across the Virgo central eld with the aim of understanding the role played by the environment in the evolution of dwarf galaxies. This sample is a subset of a larger list of dwarf galaxies for which deep H imaging has been collected. Chemical abundances have been derived for the sample using either a direct estimation of the electron temperature or empirical calibrations. Abundances obtained using dieren t empirical calibrations have been compared. Preliminary results show abundances to be correlated with blue and near-infrared luminosity, total H I mass and color, with lower abundances associated with the fainter, gas-rich, bluer galaxies.