High‐Velocity Clouds: Building Blocks of the Local Group
High‐Velocity Clouds: Building Blocks of the Local Group
We suggest that the high-velocity clouds (HVCs) are large clouds, with typical diameters of 25 kpc, containing 3×107 M☉ of neutral gas and 3×108 M☉ of dark matter, falling onto the Local Group; altogether the HVCs contain 1010 M☉ of neutral gas. Our reexamination of the Local Group hypothesis for …