The low-angular-momentum Hercules III and IV subgroups, after removing high-alpha thick disk stars, show iron-peak and Odd-Z enhancements that suggest an origin near the Milky Way's outer bar.
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On the origin of the Hercules group: I. chemical signatures indicating the outer bar origin
The low-angular-momentum Hercules III and IV subgroups, after removing high-alpha thick disk stars, show iron-peak and Odd-Z enhancements that suggest an origin near the Milky Way's outer bar.