(Hα+[N II])/I ratio using images from the ACS aboard the HST. We note that the peak of the emission coincides with the position of the nucleus. The magenta contours are curves of isotemperatures. The outer contour has T_e ~ 43 500 K and the temperature increases inward. The cyan contours are associated with the [O I]/Hα ratio, with values of 0.6, 0.7, and 0.8 from the outside to the inside. The × sign marks the maximum [N II]λ5755 emission. A very hot region associated with high values of [O I]/Hα is probably related to shock-heated regions since photoionization models cannot produce such a high temperature. The resolved nuclear radio jet has a PA of 65°.