The Sausage Globular Clusters

Understand

The Gaia Sausage is an elongated structure in velocity space discovered by Belokurov et al.

• (2018) using the kinematics of metal-rich halo stars.
• It was created by a massive dwarf galaxy ($\sim 5 \times 10^{10} M_\odot$) on a strongly radial orbit that merged with the Milky Way at a redshift $z\lesssim 3$.
• We search forthe associated Sausage Globular Clusters by analysing the structure of 91 Milky Way globular clusters (GCs) in action space using the Gaia Data Release 2 catalogue, complemented with Hubble Space Telescope proper motions.