Galaxy Interactions: The HI Signature

An HI Mosaic of the Circinus Galaxy

HI and Galaxy Formation in Loose Groups

Models of hierarchical galaxy formation predict that large numbers of low-mass, dark matter halos remain around galaxies today. These models predict an order of magnitude more halos than observed stellar satellites in the Local Group. One possible solution to this discrepancy is that the high-velocity clouds (HVCs) around the Milky Way may be associated with the excess dark matter halos and be ...

HI observations towards the Sagittarius dwarf spheroidal galaxy

We have measured the λ21 cm line of Galactic H i over more than 50 square degrees in the direction of the Sagittarius dwarf spheroidal galaxy. The data show no evidence of H i associated with the dwarf spheroidal which might be consider analogous to the Magellanic Stream as it is associated in both position and velocity with the Large Magellanic Cloud. Nor do the H i data show evidence for any ...

Tracing Interactions in Hcgs through the Hi

We present a global study of HI spectral line mapping for 16 Hickson Compact Groups (HCGs) combining new and unpublished VLA data, plus the analysis of the HI content of individual galaxies. Sixty percent of the groups show morphological and kinematical signs of perturbations (from multiple tidal features to concentration of the HI in a single enveloping cloud) and sixty ve of the resolved gala...

Gas & Galaxy Evolution : HI Imaging of the Large Magellanic Cloud

We present results from the combined Australia Telescope Compact Array (ATCA) aperture synthesis mosaic survey of HI emission in the Large Magellanic Cloud with 64m Parkes single dish telescope observations.