H<scp>i</scp>Shells behind the Coalsack
H<scp>i</scp>Shells behind the Coalsack
We report the discovery of two new large H I shells in the direction of the Coalsack Nebula. Both shells were observed with the Parkes Radio Telescope as part of the Southern Galactic Plane Survey. The largest shell, GSH 304-00-12, is at a distance of ~1.2 kpc and has derived …