APOGEE Detection of N-rich stars in the tidal tails of Palomar 5
  Recent results from chemical tagging studies using APOGEE data suggest a
strong link between the chemical abundance patterns of stars found within
globular clusters, and chemically peculiar populations in the Galactic halo
field. In this paper we analyse the chemical compositions of stars within the
cluster body and tidal streams of Palomar 5, a globular cluster that is being
tidally disrupted by interaction with the Galactic gravitational potential. We
report the identification of nitrogen-rich (N-rich) stars both within and
beyond the tidal radius of Palomar 5, with the latter being clearly aligned
with the cluster tidal streams; this acts as confirmation that N-rich stars are
lost to the Galactic halo from globular clusters, and provides support to the
hypothesis that field N-rich stars identified by various groups have a globular
cluster origin.
