Origin of the new axisymmetric radio sources

In a previous publication, the authors have reported the discovery of two nonthermal radio sources lying near the galactic plane, which have surface brightness distributions radically different from those of the supernova remnants with which they had been formerly classified. The authors discuss some of their physical properties (distances, ages, energetics) and describe briefly a scenario in which the observed radiation is produced by electrons generated in a relativistic outflow from high-velocity accreting binary systems. (author)