Spatial regularity of the young stellar population in the ring of NGC
  6217
  The relative contribution of various physical processes to the spatial and
temporal distribution of molecular clouds and star-forming regions in the disks
of galaxies has not been fully studied. The spatial regularity in the
distribution of the young stellar population in spiral and ring structures is a
good test to study this contribution. We investigate photometric properties of
the ring and spiral arms in the barred spiral galaxy NGC 6217 based on analysis
of GALEX ultraviolet, optical UBVRI and Halpha surface photometry data. The
ring in the galaxy is located near the corotation area. A spatial regularity in
the distribution of the young stellar population along the galaxy ring was
found. The characteristic scale of spacing is about 700 pc. At the same time,
we did not find a similar regularity in the distribution of the young stellar
population along the spiral arms of NGC 6217. The spatial regularity in
concentration of young stellar groupings along spiral arms is a quite rare
phenomenon, and it has never been found before in galactic rings.
