The large-scale radio continuum structure of the Sombrero galaxy (NGC4594).

We observed the nearly edge-on early-type spiral galaxy NGC 4594 (M 104, the "Sombrero" galaxy) with the Very Large Array and have detected extended emission at 1.49 GHz with a total flux of about 13 mJy. This emission originates in two components, a ring associated with the H I and dust rings, and a spheroidal component with a large z-extent. The contribution of the latter to the total flux is twice as much as that of the ring. Comparison with Hα measurements indicates that less than 10% of the disk emission is thermal. The star formation rate derived from Hα and from the radio continuum is rather low (0.8M_sun_yr^-1^) which is consistent with the low radio surface brightness and FIR emission. We detected linearly polarized emission in a spur that emerges from the active nucleus.