Light-Element Abundances of Giant Stars in the Globular Cluster M71 (NGC
  6838)
  Aluminum is the heaviest light element displaying large star--to--star
variations in Galactic globular clusters (GCs). This element may provide
additional insight into the origin of the multiple populations now known to be
a common place in GCs, and also the nature of the first-generation stars
responsible for a cluster's chemical inhomogeneities. In a previous analysis we
found that, unlike more metal-poor GCs, 47 Tuc did not exhibit a strong Na-Al
correlation, which motivates a careful study of the similar metallicity but
less massive GC M71. We present chemical abundances of O, Na, Al, and Fe for 33
giants in M71 using spectra obtained with the WIYN-Hydra spectrograph. Our
spectroscopic analysis finds that, similar to 47 Tuc and in contrast with more
metal-poor GCs, M71 stars do not exhibit a strong Na-Al correlation and span a
relatively narrow range in [Al/Fe], which are characteristics that GC formation
models must reproduce.
