Distance of HiGAL sources

In the Galaxy, large (>10000) homogeneous samples of sources for which distance are available, covering the whole galactic distance range, are still missing. Here we present a catalog of velocity and distance for a large sample (>100000) of Hi-GAL compact sources.

We develop a fully automatic Python-package to extract the velocity and determine the distance. To assign a velocity to a Hi-GAL compact source, the code uses all the available spectroscopic data complemented by a morphological analysis. Once the velocity is determined, if no stellar or maser parallax distance is known, the kinematic distance is calculated and the distance ambiguity (for sources located inner the Solar circle) is solved with the HII self-absorption method or from distance-extinction data.