Abstract

We present the recent results obtained with Hi 21cm-line survey and H survey of about 20 WR galaxies. The HI images show tidal tails and other features attributable to a recent tidal encounter. The preliminary results indicate that galaxy-galaxy tidal interactions is the main cause of star formation in these galaxies. In a few cases, the companion galaxy is not known visibly and is most likely to be a low mass Hi cloud or another faint dwarf galaxy. This study will be useful in understanding star formation trigger in galaxies, particularly in low mass systems such as dwarf galaxies.