H-band discovery of additional Second-Generation stars in the Galactic
  Bulge Globular Cluster NGC 6522 as observed by APOGEE and Gaia
  We present elemental abundance analysis of high-resolution spectra for five
giant stars, deriving Fe, Mg, Al, C, N, O, Si and Ce abundances, and spatially
located within the innermost regions of the bulge globular cluster NGC 6522,
based on H-band spectra taken with the multi-object APOGEE-north spectrograph
from the SDSS-IV Apache Point Observatory Galactic Evolution Experiment
(APOGEE) survey. Of the five cluster candidates, two previously unremarked
stars are confirmed to have second-generation (SG) abundance patterns, with the
basic pattern of depletion in C and Mg simultaneous with enrichment in N and Al
as seen in other SG globular cluster populations at similar metallicity. } In
agreement with the most recent optical studies, the NGC 6522 stars analyzed
exhibit (when available) only mild overabundances of the s-process element Ce,
contradicting the idea of the NGC 6522 stars being formed from gas enriched by
spinstars and indicating that other stellar sources such as massive AGB stars
could be the primary intra-cluster medium polluters. The peculiar abundance
signature of SG stars have been observed in our data, confirming the presence
of multiple generations of stars in NGC 6522.
