A false-colour all-sky map combining the column density and radial velocity of high-velocity neutral hydrogen gas detected by the HI4PI survey. Brightness corresponds to column density and hue to radial velocity.
A comparison of the high-velocity neutral hydrogen gas detected by the Leiden/Argentine/Bonn (LAB) survey and the new HI4PI survey for the same region of the sky, showing the great improvement in resolution and spatial sampling of the new map.
An all-sky map showing the location and column density of neutral hydrogen gas belonging to the high-velocity clouds of the Milky Way and two neighbouring galaxies, the Large and Small Magellanic Clouds.
Comparison of the FAT fit (right) to the original velocity field (left) of the galaxy ESO 223−G009.
Comparison of the 2DBAT fit (right) to the original velocity field (left) of the galaxy ESO 223−G009.