Figure 6.
The line-of-sight velocity of the narrow line component of the optical nebulosity (left) from a fit to the strong [N ii] λ6583 line and the FWHM velocity width (right) after correction for the instrumental resolution (98 km s−1 , FWHM). Colour bars are in units of km s−1 and the velocity zero-point is taken to be 6450 km s−1 , the velocity of the Hα nebulosity at the position of the nucleus (|$14^{\rm h}07^{\rm m}29{^{\mathrm{s}}_{.}}8$|, −27° 01′ 06|${^{\prime\prime}_{.}}$|4, marked with an X). Only pixels where the [N ii] λ6583 emission line was detected above 4σ are shown and the images are overlaid with contours of Hα emission from our SOAR narrow-band images.