We present high resolution two-dimensional velocity fields from
integral field spectroscopy along with derived rotation curves for
eleven low surface brightness galaxies. We fit NFW
and pseudo-isothermal halo models to the new data combined with
previous long-slit and HI data. In most cases we find the
pseudo-isothermal halo to better represent the data than the NFW halo,
as the NFW concentrations are often lower than expected for a
LambdaCDM cosmology. We also compare our results to previous studies
and find that including the new two-dimensional optical data does not
significantly alter the halo parameters, but does decrease the
uncertainties by roughly a factor of 2.
Click here for the PDF version of the paper with high resolution images of the DensePak galaxy overlays as well as full resolution GREYSCALE velocity fields for all the galaxies.
ABSTRACT