8 Lindblad et al. Fig. 7.— Best model fit to the emission line intensities and line of sight velocities (Model 3 as described in the text). The dotted line indicates the derived redshift of the nuclear source. TABLE 1 Parameters for the model presented in Fig. 7. Disk 1 and Disk 2 make up the emission line disk with scale lengths r$_{d}$ $_{of 0}$. ′′ 7 and 4 ′′ respectively (c.f. Fig. 8). Component Nucleus ←− Jet −→ ←− Cloud −→ Disk 1 Disk 2 ←− Spiral arms −→ Pixel 0 1 2 3 4 5 6 7 128 − 140 Arcsec 0 0.26 0.52 0.78 1.05 1.31 1.6 1.8 r$_{d}$ = 0 . 7 r$_{d}$ = 4 33 − 37 Velocity km s − 1 0 − 214 − 214 − 214 − 214 − 214 +250 +250 Rotating Rotating − 58 − 116 Flux (H α ) 4700 910 910 450 1650 2100 1700 310 116 29 210 40 Flux ([NII]) 9600 1400 1140 1100 2700 5100 2600 310 250 12 72 24 Flux ([OIII]) 19400 3900 2600 1720 3900 6000 1500 600 160 0 log ([NII]/H α ) 0.31 ←− 0.28 −→ ←− 0.16 −→ 0.33 − 0 . 38 − 0 . 46 − 0 . 22 log ([OIII]/H α ) 0.62 ←− 0.48 −→ ←− 0.02 −→ 0.14