The RINGS Survey III: Medium-Resolution Halpha Fabry-Perot Kinematic
  Dataset
  The distributions of stars, gas, and dark matter in disk galaxies provide
important constraints on galaxy formation models, particularly on small spatial
scales (<1kpc). We have designed the RSS Imaging spectroscopy Nearby Galaxy
Survey (RINGS) to target a sample of 19 nearby spiral galaxies. For each of
these galaxies, we are obtaining and modeling Halpha and H1~21~cm spectroscopic
data as well as multi-band photometric data. We intend to use these models to
explore the underlying structure and evolution of these galaxies in a
cosmological context, as well as whether the predictions of LCDM are consistent
with the mass distributions of these galaxies. In this paper, we present
spectroscopic imaging data for 14 of the RINGS galaxies observed with the
medium spectral resolution Fabby-Perot etalon on the Southern African Large
Telescope. From these observations, we derive high spatial resolution line of
sight velocity fields of the Halpha line of excited hydrogen, as well as maps
and azimuthally averaged profiles of the integrated Halpha and [NII] emission
and oxygen abundances. We then model these kinematic maps with axisymmetric
models, from which we extract rotation curves and projection geometries for
these galaxies. We show that our derived rotation curves agree well with other
determinations and the similarity of the projection angles with those derived
from our photometric images argues against these galaxies having intrinsically
oval disks.
