A Gemini/GMOS Study of Intermediate Luminosity Early-Type Virgo Cluster
  Galaxies. I. Globular Cluster and Stellar Kinematics
  We present a kinematic analysis of the globular cluster systems and diffuse
stellar light of four intermediate luminosity (sub-$L^{\ast}$) early-type
galaxies in the Virgo cluster based on Gemini/GMOS data. Our galaxy sample is
fainter ($-23.8<M_K<-22.7$) than most previous studies, nearly doubling the
number of galaxies in this magnitude range that now have GC kinematics. The
data for the diffuse light extends to $4R_e$, and the data for the globular
clusters reaches 8--$12R_e$. We find that the kinematics in these outer regions
are all different despite the fact that these four galaxies have similar
photometric properties, and are uniformly classified as "fast rotators" from
their stellar kinematics within $1R_e$. The globular cluster systems exhibit a
wide range of kinematic morphology. The rotation axis and amplitude can change
between the inner and outer regions, including a case of counter-rotation. This
difference shows the importance of wide-field kinematic studies, and shows that
stellar and GC kinematics can change significantly as one moves beyond the
inner regions of galaxies. Moreover, the kinematics of the globular cluster
systems can differ from that of the stars, suggesting that the formation of the
two populations are also distinct.
