Galactic ArchaeoLogIcaL ExcavatiOns (GALILEO) I. An updated census of
  APOGEE N-rich giants across the Milky Way
  (ABRIDGED) We use the 17th data release of the second phase of the Apache
Point Observatory Galactic Evolution Experiment (APOGEE-2) to provide a
homogenous census of N-rich red giant stars across the Milky Way (MW). We
report a total of 149 newly identified N-rich field giants toward the bulge,
metal-poor disk, and halo of our Galaxy. They exhibit significant enrichment in
their nitrogen abundance ratios ([N/Fe] $\gtrsim+0.5$), along with simultaneous
depletions in their [C/Fe] abundance ratios ([C/Fe] $< +0.15$), and they cover
a wide range of metallicities ($-1.8 < $ [Fe/H] $ <-0.7$). The final sample of
candidate N-rich red giant stars with globular-cluster-like (GC-like) abundance
patterns from the APOGEE survey includes a grand total of $\sim$ 412 unique
objects. These strongly N-enhanced stars are speculated to have been stripped
from GCs based on their chemical similarities with these systems. Even though
we have not found any strong evidence for binary companions or signatures of
pulsating variability yet, we cannot rule out the possibility that some of
these objects were members of binary systems in the past and/or are currently
part of a variable system. In particular, the fact that we identify such stars
among the field stars in our Galaxy provides strong evidence that the
nucleosynthetic process(es) producing the anomalous [N/Fe] abundance ratios
occurs over a wide range of metallicities. This may provide evidence either for
or against the uniqueness of the progenitor stars to GCs and/or the existence
of chemical anomalies associated with likely tidally shredded clusters in
massive dwarf galaxies such as "Kraken/Koala," \textit{Gaia}-Enceladus-Sausage,
among others, before or during their accretion by the MW. A dynamical analysis
reveals that the newly identified N-rich stars exhibit a wide range of
dynamical characteristics throughout the MW, ...
