Abstract
ABSTRACT In this work we build a detailed dynamic model for a S0 galaxy possibly hostinga central massive dark object (MDO). We show that the photometric profiles and thekinematics along the major and minor axes, including the h 3 and h 4 profiles, imply thepresence of a central MDO of mass M MDO ∼ 1.5−9.7· 10 8 M ⊙ , i.e. 0.3−2.8% of themass derived for the stellar spheroidal component. Models without MDO are unableto reproduce the kinematic properties of the inner stars and of the rapidly rotatingnuclear gas.The stellar population comprise of an exponential disc (27% of the light) anda diffuse spheroidal component (73% of the light) that cannot be represented by asimple de Vaucouleurs profile at any radius. The M/L ratios we found for the stellarcomponents (respectively 3.3 and 6.6) are typical of those ofdisc and elliptical galaxies.Key words: galaxies: individual: NGC 4350 – galaxies: kinematics and dynamics –galaxies: structure – galaxies: nuclei – dark matter 1 INTRODUCTIONThere is increasing evidence that most galaxies with a largespheroidal component host a Massive Dark Object (MDO)at their centre, with masses ranging from ∼ 10
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