A DEDICATED PHOTOMETRIC SYSTEM FOR THE CLASSIFICATION OF WOLF-RAYET STARS

We present here tests of a five-filter photometric system aimed at WR classification. In addition to the well-known easy separation between the WN and WC spectral types, these tests indicate interesting potenti alities in the discrimination of subgroups among the WN and the WC whi ch look well related to the classical subtypes. The proposed combinati ons of filters (or derived ones) bear enough discriminating power to s atisfy some evolutionary studies in crowded fields where spectroscopic follow-up is not possible.