Bulletin of the Astronomical Society of India
S. Jaiswal* and A. Omar
Aryabhatta Research Institute of Observational Sciences, Manora Peak, Nainital 263002, India
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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.
Keywords :galaxies: interaction – galaxies: Wolf-Rayet – galaxies: dwarf – galaxies: ISM