  The latest survey of stellar bow shocks (Peri et al. 2012) lists 28
candidates detected at IR wavelengths, associated with massive, early-type
stars up to 3 kpc, along with the geometrical parameters of the structures
found. I present here some considerations on the energetics involved, after the
estimation of stellar wind power, infrared flux, stellar bolometric luminosity
and radio flux limits for each source. The best candidates for relativistic
particle acceleration are highlighted.
