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Vortex rings in the working surface of radio jets |
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| Authors: | Sandip K Chakrabarti |
| Institution: | (1) International Center for Theoretical Physics, Strada Costiera 11, 34000 Trieste, Italy;(2) Theoretical Astrophysics, California Institute of Technology, Pasadena, USA;(3) Present address: Theoretical Astrophysics, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, 400 005 Bombay |
| Abstract: | We study the effects of the presence of vortex rings surrounding a supersonic radio jet inside the cocoon of a radio lobe. We show that both the jet and the shocked ambient medium are pinched. Flow speed inside the cocoon is always close to the sonic value and it stays so by successively passing through several oblique shocks. We also discuss the possibility of the non-linear growth of the instabilities of the contact surface to explain the numerical results in the literature. |
| Keywords: | radio sources jets shocks vortex rings pinch instability |
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