Fig. 6.
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Orbital selection of the RRLs. Left panel: classification of the RRL sample considering the time inside the bulge radius. Confined bulge RRLs lie in the red area, RRLs with an unknown-origin lie in the grey area, and halo and disc RRLs lie in the purple area. Right panel: total energy vs the angular momentum of the RRL stars. The bulge-confined RRLs (red) have less energy than the halo and disc (purple) and unknown-origin (grey) interlopers.
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