Where can I find a list of retrograde Milky Way stars? I read in papers that the Milky Way contains some retrograde stars (retrograde to the Milky Way rotation). Does anybody know where I can find a list of them, possibly including data on their distance from the Milky way center?
many thanks
The Milky Way's outer halo has many globular clusters with a retrograde orbit (about 40% of all clusters in Milky Way). One of the more prominent example include Kapteyn's star which is highly retrograde due to it being ripped from a dwarf galaxy and merging with the Milky Way.
However, the structure of the halo is a topic of an ongoing debate. Several studies have claimed that the halo consists of two distinct components. The &quot;inner&quot; halo consists of more metal-rich, prograde stars and &quot;outer&quot; halo consisting of metal-poor, retrograde stars. These findings have been challenged many times due to the argument on the topic of &quot;duality of motion&quot;.
More readings here:

Carollo et al. 2007
Kravtsov 2001
Kordopatis et al. 2020