Detection of neutral hydrogen in early-type dwarf galaxies of the Sculptor Group

We present our results of deep 21 cm neutral hydrogen (Hi) line observations of five early and mixed-type dwarf galaxies in the nearby Sculptor group using the ATNF 64m Parkes Radio Telescope. Four of these objects, ESO294-G010, ESO410-G005, ESO540-G030, and ESO540-G032, were detected in Hi with neutral hydrogen masses in the range of 2− 9× 10 M⊙ (MHI/LB = 0.08, 0.13, 0.16, and 0.18 M⊙/L⊙, respectively). These Hi masses are consistent with the gas mass expected from stellar outflows over a large period of time. Higher spatial resolution Hi data from the Australia Telescope Compact Array interferometer The Parkes telescope and the Australia Telescope Compact Array are part of the Australia Telescope which is funded by the Commonwealth of Australia for operation as a National Facility managed by CSIRO.