Jets, hot spots, and sidedness in double radio sources in the slingshot theory

The origin of jets and hot spots in FR II double radio sources are explaine d by a model in which a supermassive black hole possessing twin beams moves out of the host galaxy with a speed greater than the escape speed. The lob e structure arises as a combination of two trails: the trail of the forward pointing beam is the lobe itself while the backward-pointing beam creates the so-called "jet" (narrow linear high-brightness feature). We show that t he formation of the "jet" depends on the beam angle relative to the line of motion of the black hole. The same angle also controls the amount of entra inment of thermal gas in the lobe, and correlations between the component d epolarization and the existence of a jet may arise through this common fact or. The high-resolution samples of FR II radio galaxies at z < 0.3 by Hardc astle et al. and a representative sample of radio quasars by Bridle et al. are studied for evidence of the beam angle correlation with the jet formati on.