Deep H alpha images of the Wolf-Rayet galaxy He 2-10

We present continuum-free H alpha images of the remarkable Wolf-Rayet galax y He 2-10. There are extensive low surface brightness structures of ionized gas around He 2-10, including several shells, a possible supershell, and a small, isolated Ha clump. The clump is well outside the body of the galaxy and coincides with a CO feature at the end of the galaxy's tidal tail. We believe the clump to be a small star cluster, containing about 100 O stars. This cluster may be the analog on a smaller scale of the dwarf galaxies fo rmed at the end of the tidal tails in the NGC 4038/4039 merger.