We use CTIO 4-m Mosaic II images taken with the Washington CM and Harris
R filters to identify candidate globular clusters in the six major galaxies
of the Sculptor group: NGC 45, NGC 55, NGC 247, NGC 254, NGC 300, and NGC 7793.
From follow-up spectroscopy with Hydra-CTIO, we find 19 new globular clusters
in NGC 55, NGC 247, NGC 253, and NGC 300, bringing the total number of known
Sculptor group globular clusters to 36. The newly discovered clusters have
spectroscopic ages consistent with those of old Milky Way globular clusters,
and the majority are metal-poor. Their luminosity function closely resembles
that of the Milky Way's globular clusters; their metallicity distribution is
somewhat more metal-rich, but this may be the result of our color selection of
candidates. The mean [α/Fe] ratio in the clusters is −0.2±0.3, which
is lower than the Milky Way average. The specific frequencies SN​ are similar
to those of other late-type galaxies. However, if we calculate the specific
frequency using the K-band total magnitudes of the host galaxies, we find
values that are more than a factor of two higher. The kinematics of the
globular cluster systems are consistent with rotation with the \ion{H}{1} disk
in each of the four galaxies; however, only in NGC 253 is this result based on
more than seven objects. We suggest that the Sculptor group galaxies add to
evidence indicating that many of the first generation globular clusters formed
in disks, not halos.Comment: 22 pages, 13 figures, 7 Tables. Full Table 3 available electronically
at http://www.ctio.noao.edu/~olsen/tab3.tex. To appear in May 2004 issue of
the Astronomical Journa