Linking nearby stellar streams to more distant halo overdensities

Understand

It has been recently shown that the halo near the Sun contains several kinematic substructures associated to past accretion events.

• For the more distant halo, there is evidence of large-scale density variations -- in the form of stellar clouds or overdensities.
• We study the link between the local halo kinematic groups and three of these stellar clouds: the Hercules-Aquila cloud, the Virgo Overdensity, and the Eridanus-Phoenix overdensity.
• We perform orbital integrations in a standard Milky Way potential of a local halo sample extracted from Gaia eDR3, with the goal of predicting the location of the merger debris elsewhere in the Galaxy.