Three-dimensional hydrodynamic simulations of narrow-angle-tail radio sources. I - The Begelman, Rees, and Blandford model

Astronomy and Astrophysics – Astronomy

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Astronomical Models, Kelvin-Helmholtz Instability, Radio Jets (Astronomy), Supersonic Flow, Three Dimensional Models, Radio Sources (Astronomy), Space Density, Taylor Instability

Scientific paper

The bending of light supersonic jets by a wind flowing normally to them has been computationally studied using the Riemann code at the highest resolutions. The 3D Riemann hydracode is based on the piecewise parabolic method of Colella and Woodward. The internal structure of the jet including primary and secondary oblique shocks has been resolved and their role in jet bending, deceleration, and formation of knots is clarified. The Kelvin-Helmholtz instability through which the jet eventually disrupts is also resolved. Results obtained are compared to the analytical work of Begelman, Rees, and Blandford (1979) and applied to the interpretation of the archetypal narrow-angle-tail radio source NGC 1265.

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