... The large circles in (b) show mean masses within narrow R intervals, and the solid lines show the rms regression fits for thick-disk and old-halo (left) and young-halo and corona (right) clusters. ...
... The open triangles are thick-disk clusters; open circles, old halo clusters; filled circles, young-halo clusters; filled triangles, corona clusters; and crosses, metal-poor clusters with unknown (B–R)/(B+V+R) . ...
... The open circles correspond to the old halo, filled circles to the young halo (large filled circles correspond to clusters with (B-R)/(B+V+R)>0.32 ), and filled triangles to the corona. discussion in the text | ...
... N OTE: . Only clusters with R<60 kpc were used to compute the spatial parameters and metallicity gradients for all subsystems except the corona. ...
... The enormous prograde rotational velocity of the corona, together with its relatively low V and the large deviation of the line in Fig. 8c from the origin, also testify to an extragalactic origin for the corona clusters. ...