We argue that the interaction of stellar wind with the surface of a circumstellar accretion (or protoplanetary) disk can result in the acceleration of relativistic electrons in an external layer of the disk, and produce synchrotron radiation. Conservative estimates give a total synchrotron luminosity $L_s\sim 10^{ -5}\lsun$ for a central star with $\dot M=10^{ -6}\msun$ yr$^{ -1}$, comparable with the value observed around the TW object in the W3(OH) region.
Categories: astro-ph
