We present an abundance analysis of eight potential member stars of the old Galactic bulge globular cluster NGC 6522 .
The same stars have previously been studied by Chiappini et al .
( 5 ) , who found very high abundances of the slow neutron capture elements compared with other clusters and field stars of similar metallicity , which they interpreted as reflecting nucleosynthesis in rapidly rotating , massive Population III stars .
In contrast to their analysis , we do not find any unusual enhancements of the neutron capture elements Sr , Y , Ba and Eu and conclude that previous claims result mainly from not properly accounting for blending lines .
Instead we find NGC 6522 to be an unremarkable globular cluster with comparable abundance trends to other Galactic globular clusters at the same metallicity ( \mathrm { [ Fe / H ] } = -1.15 \pm 0.16 ) .
The stars are also chemically similar to halo and bulge field stars at the same metallicity , spanning a small range in [ Y/Ba ] and with normal \alpha -element abundances .
We thus find no observational evidence for any chemical signatures of rapidly rotating Population III stars in NGC 6522 .