Separation of regular halo stars that are CN-normal and CH-strong (black dots) and the bona fide CN-strong, CH-weak stars that we assume to have originated in now-dissolved GCs (red circles). In concordance with Fig. 3, this was done in separate metallicity bins. While not used in the actual statistics, we include stars above [Fe/H] = −1.3 in this figure for illustration.
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