Evidence for a massive dark object in NGC 4350

In this work we build a detailed dynamic model for an S0 galaxy possibly ho sting a central massive dark object (MDO). We show that the photometric pro files and the kinematics along the major and minor axes, including the h(3) and h(4) profiles, imply the presence of a central MDO of mass M(MDO)simil ar to1.5-9.7x10(8) M-., i.e. 0.3-2.8 per cent of the mass derived for the s tellar spheroidal component. Models without MDO are unable to reproduce the kinematic properties of the inner stars and of the rapidly rotating nuclea r gas. The stellar population consists of an exponential disc (27 per cent of the light) and a diffuse spheroidal component (73 per cent of the light) that c annot be represented by a simple de Vaucouleurs profile at any radius. The ML ratios we found for the stellar components (3.3 and 6.6 respectively) ar e typical of those of disc and elliptical galaxies.