Synchrotron emission from circumstellar disks around massive stars
  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. 
Yu. A. Shchekinov (Rostov State U.), A. M. Sobolev (Ural State U.)