We have completed a new fiber array, SparsePak, optimized for
low-surface-brightness studies of extended sources on the WIYN telescope. We
are now using this array as a measuring engine of velocity and
velocity-dispersion fields of stars and ionized gas in disk galaxies from high
to low surface-brightness. Here we present commissioning data on the velocity
ellipsoids, surface densities and mass-to-light ratios in two blue, high
surface-brightness, yet small disks. If our preliminary results survive further
observation and more sophisticated analysis, then NGC 3949 has sigma_z/sigma_R
>> 1, implying strong vertical heating, while NGC 3982's disk is substantially
sub-maximal. These galaxies are strikingly unlike the Milky Way, and yet would
be seen more easily at high redshift.Comment: to appear in Disk Galaxies: Kinematics, Dynamics and Perturbations,
eds. E. Athanassoula and A. Bosma, ASP Conference Series; 4 pages with 4
embedded figure