APOGEE-2S Mg–Al anti-correlation of the metal-poor globular cluster NGC 2298

We present detailed elemental abundances and radial velocities of stars in the metal-poor globular cluster (GC) NGC 2298, based on near-infrared high-resolution ($R\sim$ 22,500) spectra twelve members obtained during second phase Apache Point Observatory Galactic Evolution Experiment (APOGEE-2) at Las Campanas as part seventeenth Data Release (DR 17) Sloan Digital Sky Survey IV (SDSS-IV). employ Brussels Automatic Code for Characterizing High accuracy Spectra (\texttt{BACCHUS}) software to investigate a variety species including $\alpha$-elements (Mg, Si, Ca), odd-Z element Al, iron-peak elements (Fe Ni) located innermost regions 2298. find mean median metallicity [Fe/H] $ = -1.76$ $-1.75$, respectively, with star-to-star spread 0.14 dex, compatible internal measurement errors. Thus, we no evidence an intrinsic Fe abundance The typical $\alpha-$element enrichment 2298 is overabundant relative Sun, follows trend other GCs. confirm existence Al-enhanced population this cluster, which clearly anti-correlated Mg, indicating prevalence multiple-population phenomenon