Fig. 10.
Contours of constant prolate spheroidal coordinates, (λ, ν), with foci at R = 0 and z = ±0.88 kpc (see text). Contours of constant λ are shown in blue, contours of constant ν in red. The green ellipses show some of our measured velocity ellipses (Method 1). Their orientation does not align with the coordinate contours at R ≳ 10 kpc and |z|≳2 kpc.
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