  Fluorine (19F) abundances are derived in a sample of 6 bulge red giants in
Baade's Window. These giants span a factor of 10 in metallicity and this is the
first study to define the behavior of 19F with metallicity in the bulge. The
bulge results show an increase in F/O with increasing oxygen. This trend
overlaps what is found in the disk at comparable metallicities, with the most
oxygen-rich bulge target extending the disk trend. The increase in F/O in the
disk arises from 19F synthesis in both asymptotic giant branch (AGB) stars and
metal-rich Wolf-Rayet (WR) stars through stellar winds. The lack of an
s-process enhancement in the most fluorine-rich bulge giant in this study,
suggests that WR stars represented a larger contribution than AGB stars to 19F
production in the bulge when compared to the disk. If this result for fluorine
is combined with the previously published overall decline in the O/Mg abundance
ratios in metal-rich bulge stars, it suggests that WR winds played a role in
shaping chemical evolution in the bulge. One star in this study exhibits a very
low value of F/O while having a large O-abundance; this chemical mixture can be
understood if this star formed from gas that was enriched by metal-poor
core-collapse supernovae and may indicate that chemical evolution in the bulge
was inhomogeneous.
