Ionized gas rotation curves in nearby dwarf galaxies
  We present the results of study of the ionized gas velocity fields in 28
nearby (systemic velocity below 1000 km/s) dwarf galaxies. The observations
were made at the 6-m BTA telescope of the SAO RAS with the scanning Fabry-Perot
interferometer in the H-alpha emission line. We were able to measure regular
circular rotation parameters in 25 galaxies. As a rule, rotation velocities
measured in HII are in a good agreement with the data on the HI kinematics at
the same radii. Three galaxies reveal position angles of the kinematic axis in
the HII velocity fields that strongly (tens of degrees) differ from the
measurements in neutral hydrogen at large distances from the center or from the
orientation of the major axis of optical isophotes. The planes of the gaseous
and stellar disks in these galaxies most likely do not coincide. Namely, in DDO
99 the gaseous disk is warped beyond the optical radius, and in UGC 3672 and
UGC 8508 the inclination of orbits of gas clouds varies in the inner regions of
galaxies. It is possible that the entire ionized gas in UGC 8508 rotates in the
plane polar to the stellar disk.
