We present observations of the nearby barred starburst galaxy , M 83 ( NGC 5236 ) , with the new Fabry-Perot interferometer GH \alpha FaS mounted on the 4.2 meter William Herschel Telescope on La Palma .
The unprecedented high resolution observations , of 16 pc/FWHM , of the H \alpha -emitting gas cover the central two kpc of the galaxy .
The velocity field displays the dominant disk rotation with signatures of gas inflow from kpc scales down to the nuclear regions .
At the inner Inner Lindblad Resonance radius of the main bar and centerd at the dynamical center of the main galaxy disk , a nuclear 5.5 ( \pm 0.9 ) \times 10 ^ { 8 } M _ { \sun } rapidly rotating disk with scale length of 60 \pm 20 pc has formed .
The nuclear starburst is found in the vicinity as well as inside this nuclear disk , and our observations confirm that gas spirals in from the outer parts to feed the nuclear starburst , giving rise to several star formation events at different epochs , within the central 100 pc radius of M 83 .