CAPOS member stars in 18 globular clusters

First, we carry out a stringent selection of cluster members, finding a total of 295 having spectral SNR>70. We reinforced the finding that stars with high [N/Fe] abundances show higher [Fe/H] than their lower [N/Fe] counterparts. Mg, Ca and global {alpha} abundances show similar trends, while Si is well-behaved.

The [Fe/H] value of these 2nd population stars is corrected to derive the mean metallicity. Mean metallicities are determined to a precision of 0.05dex, [{alpha}/Fe] to 0.06dex, and radial velocity to 3.4km/s. No clusters show strong evidence for internal metallicity variations.

Abundances for eleven other elements using only 1st population stars are calculated. Our values are generally in good agreement with the literature. We developed a new chemodynamical GC classification scheme, synthesizing recent studies.

We also compile up-to-date metallicities. The BGC metallicity distribution is bimodal, with peaks near [Fe/H]=-0.45 and -1.1, with the metal-poor peak strongly dominant. The entire in situ sample, including Disk and BGCs, shows the same bimodality, while ex situ GCs are unimodal, with a peak around -1.6.

Surprisingly, we find a negligible difference in the mean [Si/Fe] of in and ex situ GCs.