We study the ionization and kinematics of the ionized gas in the nuclear region of the barred Seyfert 2 galaxy NGC 5643 using MUSE integral field observations in the framework of the MAGNUM ( Measuring Active Galactic Nuclei Under MUSE Microscope ) survey .
The data were used to identify regions with different ionization conditions and to map the gas density and the dust extinction .
We find evidence for a double sided ionization cone , possibly collimated by a dusty structure surrounding the nucleus .
At the center of the ionization cone , outflowing ionized gas is revealed as a blueshifted , asymmetric wing of the [ OIII ] emission line , up to projected velocity v _ { 10 } \sim - 450 km s ^ { -1 } .
The outflow is also seen as a diffuse , low luminosity radio and X-ray jet , with similar extension .
The outflowing material points in the direction of two clumps characterized by prominent line emission with spectra typical of HII regions , located at the edge of the dust lane of the bar .
We propose that the star formation in the clumps is due to ‘ positive feedback ’ induced by gas compression by the nuclear outflow , providing the first candidate for outflow induced star formation in a Seyfert-like radio quiet AGN .
This suggests that positive feedback may be a relevant mechanism in shaping the black hole-host galaxy coevolution .