The Parent Populations of 6 groups identified from Chemical Tagging in
  the Solar neighborhood
  We estimate the size and distribution of the parent populations for the 6
largest (at least 20 stars in the Solar neighborhood) chemical groups
identified in the Chemical Tagging experiment by Mitschang et al.~2014. Stars
in the abundance groups tend to lie near a boundary in angular momentum versus
eccentricity space where the probability is highest for a star to be found in
the Solar neighborhood and where orbits have apocenter approximately equal to
the Sun's galactocentric radius. Assuming that the parent populations are
uniformly distributed at all azimuthal angles in the Galaxy, we estimate that
the parent populations of these abundance groups contain at least 200,000
members. The spread in angular momentum of the groups implies that the
assumption of a uniform azimuthal distribution only fails for the two youngest
groups and only for the highest angular momentum stars in them. The parent
populations of three thin disk groups have narrow angular momentum
distributions, but tails in the eccentricity and angular momentum distributions
suggest that only a small fraction of stars have migrated and increased in
eccentricity. In contrast, the parent populations of the thick disk groups
exhibit both wide angular momentum and eccentricity distributions implying that
both heating and radial migration has taken place.
