galstreams: A Library of Milky Way Stellar Stream Footprints and Tracks

Understand

Nearly a hundred stellar streams have been found to date around the Milky Way and the number keeps growing at an ever faster pace.

• Here we present the galstreams library, a compendium of angular position, distance, proper motion and radial velocity track data for nearly a hundred (95) Galactic stellar streams.
• The information published in the literature has been collated and homogenised in a consistent format and used to provide a set of features uniformly computed throughout the library: e.g.
• stream length, end points, mean pole, stream's coordinate frame, polygon footprint, and pole and angular momentum tracks.