HI distribution in dwarf starburst galaxy NGC 5253
Neutral hydrogen(HI)gas is the fundamental material for star formation that drives the evolution of a galaxy.For starburst dwarf galaxy NGC 5253,previous study has observed HI gas distributed asymmetrically with～7 kpc extension toward north-east direction using the radio interferometry.This extension is likely indicating the dynamical connection between NGC 5253 and its nearby spiral galaxy M 83.To investigate the possible HI bridge between these two galactic systems,we acquire the HI mapping data around NGC 5253 in radio L-band from the Robert C.Byrd Green Bank Telescope.We have detected the 7 possible HI gas clouds between NGC 5253 and M 83.These HI gas cloud candidates distribute mainly in the north-east direction extending over 60 kpc from NGC 5253.These clouds could play an important role in triggering intensive star formation activity in the dwarf galaxy NGC 5253.
万方数据
维普
