3D Simulations of Relativistic Precessing Jets Probing the Structure of Superluminal Sources

Details 3D Simulations of Relativistic Precessing Jets Probing the Structure of Superluminal Sources 3D Simulations of Relativistic Precessing Jets Probing the Structure of Superluminal Sources

2003-02-06

arxiv.org/abs/astro-ph/0302123v1

Astrophys.J. 585 (2003) L109-L112

Astronomy and Astrophysics

Astrophysics

Accepted for publication in ApJL. 4 pages, 5 figures (4 in color)

Scientific paper

10.1086/374543

We present the results of a three-dimensional, relativistic, hydrodynamic simulation of a precessing jet into which a compact blob of matter is injected. A comparison of synthetic radio maps computed from the hydrodynamic model, taking into account the appropriate light travel time delays, with those obtained from observations of actual superluminal sources shows that the variability of the jet emission is the result of a complex combination of phase motions, viewing angle selection effects, and non-linear interactions between perturbations and the underlying jet and/or the external medium. These results question the hydrodynamic properties inferred from observed apparent motions and radio structures, and reveal that shock-in-jet models may be overly simplistic.

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