Numerical simulations of the bending of narrow-angle-tail radio jets by Ram pressure or pressure gradients

Details Numerical simulations of the bending of narrow-angle-tail radio jets by Ram pressure or pressure gradients Numerical simulations of the bending of narrow-angle-tail radio jets by Ram pressure or pressure gradients

Apr 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...327..627s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 327, April 15, 1988, p. 627-638.

Statistics

Computation

7

Computerized Simulation, Galactic Structure, Hydrodynamic Ram Effect, Intergalactic Media, Radio Jets (Astronomy), Radio Sources (Astronomy), Computational Astrophysics, Cosmic Gases, Cross Sections, Pressure Gradients, Radio Galaxies

Scientific paper

Three-dimensional numerical hydrodynamic simulations are used to study the bending of radio jets. The simulations are compared with observations of jets in narrow-angle-tail radio sources. Two mechanisms for the observed bending are considered: direct bending of quasi-continuous jets by ram pressure from intergalactic gas and bending by pressure gradients in the interstellar gas of the host galaxy, the pressure gradients themselves being the result of ram pressure by intergalactic gas. It is shown that the pressure gradients are much less effective in bending jets, implying that the jets have roughly 30 times lower momentum fluxes if they are bent by this mechanism. Ram-pressure bending produces jets with 'kidney-shaped' cross sections; when observed from the side, these jets appear to have diffuse extensions on the downstream side. On the other hand, pressure-gradient bending causes the jets to be densest near their upstream side.

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