The Sombrero galaxy III. Ionised gas and dust in the central 200 pc: a nuclear bar?

We present the results of new 3D TIGER spectroscopic observations and archi ved HST/WFPC2 and NICMOS images of the central region of M 104. The [N II]H alpha images reveal the presence of a nuclear spiral structure, and the g aseous kinematics in the central arcsecond shows evidence for kinematical d ecoupling of the central peak. A straight nuclear dust lane, with a weak sy mmetric counterpart, is seen in the V - I and V - H colour maps. These resu lts hint for the presence of a strong nuclear bar, that would be located in side the inner Linblad resonance of the large-scale bar discussed by Emsell em (1995).