Fig. 16

The distributions of chromospheric activity against kinematic space motion with main sequence stars as open circles and red filled circles are subgiants. The bimodal activity clusters of stars can be discerned in these plots with a cluster of active and inactive stars, bounded by the dashed lines. Intriguingly the inactive cluster, after the Vaughan-Preston gap, seems to correlate with the dispersing of stars in the galactic disk. Such a result indicates there may be connection between stellar activity, stellar rotation and stellar kinematics. The green shaded region in the V and total velocity plots visually highlights useful parameter space for using kinematics to select inactive stars.
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