Magnetized jet models for radio sources

Astronomy and Astrophysics – Astronomy

Scientific paper

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Astronomical Models, Magnetohydrodynamics, Molecular Clouds, Plasma Jets, Radio Sources (Astronomy), Boundary Value Problems, Field Theory (Physics), Mach Number

Scientific paper

Previous numerical calculations of the boundary of radio jet models consisting of a relativistic fluid that flows into a confining, dimpled gas cloud are extended. When all of the azimuthal field is assumed to remain inside the jet, the resulting boundary shapes are puffed up with respect to those formed in identical potentials with no anisotropic magnetic pressure. When the azimuthal component is allowed to escape from the jet into a sheath or cocoon around it, the pinching effect of this field geometry results in better collimation. This effect is stronger near the source of the ejected plasma. Overall evolution is retarded or unchanged when pressure and energy are explicitly included.

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