NGC 6221 ionized gas kinematics

The observed kinematics extends out to about 80'' from the nucleus. Narrow and broad-band imaging is also presented.

The radial profiles of the fluxes ratio [NII] ({lambda} 6583.4{AA})/H{alpha} reveal the presence of a ring-like structure of ionized gas, with a radius of about 9'' and a deprojected circular velocity of about 280km/s. The analysis of the dynamics of the bar indicates this ring is related to the presence of an inner Lindblad resonance (ILR) at 1.3kpc. NGC 6221 is found to exhibit intermediate properties between those of the early-type barred galaxies: the presence of a gaseous ring at an ILR, the bar edge located between the ILR's and the corotation radius beyond the steep rising portion of the rotation curve, the dust-lane pattern, and those of the late-type galaxies: an almost exponential surface brightness profile, the presence of H{alpha} regions along all the bar, the spiral-arm pattern.