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We present a study of the $\rm{[OIII]\lambda\,5007}$ line profile in asub-sample of 8 active galactic nuclei (AGN) and 6 non-AGN in theoptically-selected green valley at $\rm{z\,<\,0.5}$ using long-slitspectroscopic observations with the 11 m Southern African Large Telescope.Gaussian decomposition of the line profile was performed to study its differentcomponents. We observe that the AGN profile is more complex than the non-AGNone. In particular, in most AGN (5/8) we detect a blue wing of the line. Wederive the FWHM velocities of the wing and systemic component, and find thatAGN show higher FWHM velocity than non-AGN in their core component. We alsofind that the AGN show blue wings with a median velocity width of approximately600 $\rm{km\,s^{-1}}$, and a velocity offset from the core component in therange -90 to -350 $\rm{km\,s^{-1}}$, in contrast to the non-AGN galaxies, wherewe do not detect blue wings in any of their $\rm{[OIII]\lambda\,5007}$ lineprofiles. Using spatial information in our spectra, we show that at least threeof the outflow candidate galaxies have centrally driven gas outflows extendingacross the whole galaxy. Moreover, these are also the galaxies which arelocated on the main sequence of star formation, raising the possibility thatthe AGN in our sample are influencing SF of their host galaxies (such aspositive feedback). This is in agreement with our previous work where westudied SF, morphology, and stellar population properties of a sample of greenvalley AGN and non-AGN galaxies.

The [OIII] profiles of far-infrared active and non-active optically-selected green valley galaxies