The Galactic Halo as seen by Pan-STARRS1
The Galactic Halo as seen by Pan-STARRS1
The Galactic Halo as seen by Pan-STARRS1
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Origin of Bifurcation<br />
Multiple wraps: unlikely<br />
Internal rotation: unlikely<br />
(Fellhauer+06, but see Yanny+09)<br />
(Peñarrubia+10, but see Peñarrubia+11)<br />
No evidence of internal rotation<br />
Existing sims disagree with trailing arm<br />
Double accretion Plausible Unknown.<br />
Complex dwarf structure Unknown.