Dynamical friction wake collective response

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The Large Magellanic Cloud induce a dynamical friction wake and a Collective Response in the Milky Way's (MW) DM halo. This movie illustrate those two overdensities shown with the contorus. The density contours are computed using the Basis Function Expansions (BFE) for the MW’s DM halo. White contours represent the overdensities, while the darker blue contours show the underdensities. The dynamical friction wake is a large-scale structure ranging from ∼ 50 kpc, near the LMC (red circle), out to the edge of the halo. The Collective Response is the larger overdensity that appears predominantly north of the MW disk (the latter is marked by the central blue ellipse). The Collective Response also appears to the south of the MW disk, at
large distances. The red line marks the past passage of the LMC, which tracks the location of the dynamical friction wake.

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